How Many Zeros in a Quindecillion?
How many zeros in a quindecillion? A quindecillion has 48 zeros: 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000, written as 1048 in scientific notation. It follows quattuordecillion (1045) and precedes sexdecillion (1051). Learn more about how many zeros does a trillion have.
A quindecillion has
48
zeros
- Written Form
- 1 followed by 48 zeros
- Scientific
- 10⁴⁸
The Quin- Prefix and Quindecillion's Position
The direct answer: exactly 48 zeros. The prefix quin- means five and dec- means ten — together the 16th name in the short-scale hierarchy, with 3 × 16 = 48. Related: How many zeros does an undecillion have.
What Is the Long-Scale Quindecillion?
In the long-scale numbering system — still official in France, Germany, and several other European countries — a quindecillion equals 1090, because the long scale multiplies each "-illion" by one million rather than one thousand: (106)15 = 1090. The gap between short-scale and long-scale quindecillion is a full tredecillion (1042).
Quindecillion vs Its Neighbors
| System | Zeros | Scientific notation |
|---|---|---|
| Short scale (US / modern UK) | 48 | 1048 |
| Long scale (continental Europe) | 90 | 1090 |
How Many Zeros in 100 Quindecillion?
- 1 quindecillion =
1048— 48 zeros - 100 quindecillion =
1050— 50 zeros - 1,000 quindecillion =
1051— 51 zeros (= one sexdecillion)
No physical quantity measured in science — not atoms in the universe, not Planck volumes in the observable cosmos — comes close to 1048. Quindecillion exists mainly in discussions of combinatorics and cryptography key spaces. See also: Zeros in a trevigintillion.
Zeros in a Quindecillion: FAQ
What comes before a quindecillion?
Quick answer
Hundred quattuordecillion comes right before a quindecillion.
What comes after a quindecillion?
Quick answer
Ten quindecillion comes next, followed by hundred quindecillion and then sexdecillion.
How many digits does a quindecillion have?
A quindecillion has 49 digits in total — that's the digit 1 followed by 48 zeros.
How many zeros in 2 quindecillion? In half a quindecillion?
Two quindecillion keeps the same 48 zeros. Half a quindecillion has 47 trailing zeros after the 5.
Is a 48-digit number always a quindecillion?
No. A 48-digit number tops out at hundreds of quattuordecillions — a quindecillion is the first 49-digit number.
How many zeros in a quindecillion in the British system?
Under the old long-scale system, a quindecillion meant 1090 — 42 more zeros than today's short-scale quindecillion.