251725875520 has 56 divisors (see below), whose sum is σ = 685053995904. Its totient is φ = 86306013696.

The previous prime is 251725875493. The next prime is 251725875559. The reversal of 251725875520 is 25578527152.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

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, 56186572 + ... + 56191051.

Almost surely, 2^251725875520 is an apocalyptic number.

251725875520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251725875520 is an abundant number, since it is smaller than the sum of its proper divisors (433328120384).

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

251725875520 is a wasteful number, since it uses less digits than its factorization.

251725875520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112377647 (or 112377637 counting only the distinct ones).

The product of its (nonzero) digits is 1960000, while the sum is 49.

The spelling of 251725875520 in words is "two hundred fifty-one billion, seven hundred twenty-five million, eight hundred seventy-five thousand, five hundred twenty".