251156260025 has 12 divisors (see below), whose sum is σ = 339745923024. Its totient is φ = 182659098000.

The previous prime is 251156260007. The next prime is 251156260063. The reversal of 251156260025 is 520062651152.

251156260025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 251156260025 - 2²⁶ = 251089151161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 456647471 + ... + 456648020.

It is an arithmetic number, because the mean of its divisors is an integer number (28312160252).

Almost surely, 2^251156260025 is an apocalyptic number.

251156260025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

251156260025 is a deficient number, since it is larger than the sum of its proper divisors (88589662999).

251156260025 is a wasteful number, since it uses less digits than its factorization.

251156260025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913295512 (or 913295507 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 251156260025 in words is "two hundred fifty-one billion, one hundred fifty-six million, two hundred sixty thousand, twenty-five".