251252287899880 has 32 divisors (see below), whose sum is σ = 565318112371200. Its totient is φ = 100500832565056.

The previous prime is 251252287899787. The next prime is 251252287899881. The reversal of 251252287899880 is 88998782252152.

It is a junction number, because it is equal to n+sod(n) for n = 251252287899797 and 251252287899806.

It is not an unprimeable number, because it can be changed into a prime (251252287899881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76963461 + ... + 80161579.

It is an arithmetic number, because the mean of its divisors is an integer number (17666191011600).

Almost surely, 2^{251252287899880} is an apocalyptic number.

251252287899880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251252287899880 is an abundant number, since it is smaller than the sum of its proper divisors (314065824471320).

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

251252287899880 is a wasteful number, since it uses less digits than its factorization.

251252287899880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5162193 (or 5162189 counting only the distinct ones).

The product of its (nonzero) digits is 928972800, while the sum is 76.

The spelling of 251252287899880 in words is "two hundred fifty-one trillion, two hundred fifty-two billion, two hundred eighty-seven million, eight hundred ninety-nine thousand, eight hundred eighty".