12904216797256 has 24 divisors (see below), whose sum is σ = 25001080815510. Its totient is φ = 6243975865920.

The previous prime is 12904216797233. The next prime is 12904216797293. The reversal of 12904216797256 is 65279761240921.

It can be written as a sum of positive squares in only one way, i.e., 9148628608900 + 3755588188356 = 3024670^2 + 1937934^2 .

It is a super-2 number, since 2×12904216797256² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12904216797194 and 12904216797203.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 839236381 + ... + 839251756.

Almost surely, 2^{12904216797256} is an apocalyptic number.

It is an amenable number.

12904216797256 is a deficient number, since it is larger than the sum of its proper divisors (12096864018254).

12904216797256 is a wasteful number, since it uses less digits than its factorization.

12904216797256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1678488205 (or 1678488170 counting only the distinct ones).

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 12904216797256 in words is "twelve trillion, nine hundred four billion, two hundred sixteen million, seven hundred ninety-seven thousand, two hundred fifty-six".