251162666956 has 24 divisors (see below), whose sum is σ = 452248533296. Its totient is φ = 121961350080.

The previous prime is 251162666933. The next prime is 251162666969. The reversal of 251162666956 is 659666261152.

It is a junction number, because it is equal to n+sod(n) for n = 251162666897 and 251162666906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1488366 + ... + 1648501.

Almost surely, 2^251162666956 is an apocalyptic number.

It is an amenable number.

251162666956 is a deficient number, since it is larger than the sum of its proper divisors (201085866340).

251162666956 is a wasteful number, since it uses less digits than its factorization.

251162666956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3137449 (or 3137447 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 55.

The spelling of 251162666956 in words is "two hundred fifty-one billion, one hundred sixty-two million, six hundred sixty-six thousand, nine hundred fifty-six".