251216600652 has 18 divisors (see below), whose sum is σ = 635019740628. Its totient is φ = 83738866872.

The previous prime is 251216600639. The next prime is 251216600653. The reversal of 251216600652 is 256006612152.

251216600652 is a `hidden beast` number, since 25 + 1 + 21 + 6 + 600 + 6 + 5 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6978238907 = 251216600652 / (2 + 5 + 1 + 2 + 1 + 6 + 6 + 0 + 0 + 6 + 5 + 2).

It is not an unprimeable number, because it can be changed into a prime (251216600653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3489119418 + ... + 3489119489.

Almost surely, 2^251216600652 is an apocalyptic number.

It is an amenable number.

251216600652 is an abundant number, since it is smaller than the sum of its proper divisors (383803139976).

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

251216600652 is a wasteful number, since it uses less digits than its factorization.

251216600652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6978238917 (or 6978238912 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 251216600652 in words is "two hundred fifty-one billion, two hundred sixteen million, six hundred thousand, six hundred fifty-two".