251261602116 has 96 divisors (see below), whose sum is σ = 672682348800. Its totient is φ = 71505414144.

The previous prime is 251261602099. The next prime is 251261602121. The reversal of 251261602116 is 611206162152.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30279280 + ... + 30287576.

It is an arithmetic number, because the mean of its divisors is an integer number (7007107800).

Almost surely, 2^251261602116 is an apocalyptic number.

It is an amenable number.

251261602116 is an abundant number, since it is smaller than the sum of its proper divisors (421420746684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

251261602116 is a wasteful number, since it uses less digits than its factorization.

251261602116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9693 (or 9691 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

Adding to 251261602116 its reverse (611206162152), we get a palindrome (862467764268).

The spelling of 251261602116 in words is "two hundred fifty-one billion, two hundred sixty-one million, six hundred two thousand, one hundred sixteen".