251887788652 has 12 divisors (see below), whose sum is σ = 440820883720. Its totient is φ = 125938964736.

The previous prime is 251887788623. The next prime is 251887788653. The reversal of 251887788652 is 256887788152.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (251887788653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1116213 + ... + 1322764.

Almost surely, 2^251887788652 is an apocalyptic number.

It is an amenable number.

251887788652 is a deficient number, since it is larger than the sum of its proper divisors (188933095068).

251887788652 is a wasteful number, since it uses less digits than its factorization.

251887788652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2464800 (or 2464798 counting only the distinct ones).

The product of its digits is 120422400, while the sum is 67.

The spelling of 251887788652 in words is "two hundred fifty-one billion, eight hundred eighty-seven million, seven hundred eighty-eight thousand, six hundred fifty-two".