251456526940 has 12 divisors (see below), whose sum is σ = 528058706616. Its totient is φ = 100582610768.

The previous prime is 251456526917. The next prime is 251456526977. The reversal of 251456526940 is 49625654152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6286413154 + ... + 6286413193.

It is an arithmetic number, because the mean of its divisors is an integer number (44004892218).

Almost surely, 2^251456526940 is an apocalyptic number.

251456526940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251456526940 is an abundant number, since it is smaller than the sum of its proper divisors (276602179676).

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

251456526940 is a wasteful number, since it uses less digits than its factorization.

251456526940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12572826356 (or 12572826354 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 49.

The spelling of 251456526940 in words is "two hundred fifty-one billion, four hundred fifty-six million, five hundred twenty-six thousand, nine hundred forty".