12266891536 has 15 divisors (see below), whose sum is σ = 23767960741. Its totient is φ = 6133224256.

The previous prime is 12266891531. The next prime is 12266891537. The reversal of 12266891536 is 63519866221.

The square root of 12266891536 is 110756.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 945931536 + 11320960000 = 30756^2 + 106400^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12266891536.

It is not an unprimeable number, because it can be changed into a prime (12266891531) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 429180 + ... + 456868.

Almost surely, 2^12266891536 is an apocalyptic number.

12266891536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

12266891536 is the 110756-th square number.

It is an amenable number.

12266891536 is a deficient number, since it is larger than the sum of its proper divisors (11501069205).

12266891536 is an frugal number, since it uses more digits than its factorization.

12266891536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55386 (or 27691 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

Multiplying 12266891536 by its sum of digits (49), we get a square (601077685264 = 775292²).

The spelling of 12266891536 in words is "twelve billion, two hundred sixty-six million, eight hundred ninety-one thousand, five hundred thirty-six".