251140289560 has 32 divisors (see below), whose sum is σ = 567490847040. Its totient is φ = 100024969984.

The previous prime is 251140289549. The next prime is 251140289579. The reversal of 251140289560 is 65982041152.

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, 13463872 + ... + 13482511.

It is an arithmetic number, because the mean of its divisors is an integer number (17734088970).

Almost surely, 2^251140289560 is an apocalyptic number.

251140289560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251140289560 is an abundant number, since it is smaller than the sum of its proper divisors (316350557480).

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

251140289560 is a wasteful number, since it uses less digits than its factorization.

251140289560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26946627 (or 26946623 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 251140289560 in words is "two hundred fifty-one billion, one hundred forty million, two hundred eighty-nine thousand, five hundred sixty".