251044472168 has 32 divisors (see below), whose sum is σ = 541252781760. Its totient is φ = 106930419840.

The previous prime is 251044472167. The next prime is 251044472179. The reversal of 251044472168 is 861274440152.

It is a super-2 number, since 2×251044472168² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (251044472167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13742213 + ... + 13760468.

It is an arithmetic number, because the mean of its divisors is an integer number (16914149430).

Almost surely, 2^251044472168 is an apocalyptic number.

251044472168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

251044472168 is an abundant number, since it is smaller than the sum of its proper divisors (290208309592).

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

251044472168 is a wasteful number, since it uses less digits than its factorization.

251044472168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27502857 (or 27502853 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 44.

The spelling of 251044472168 in words is "two hundred fifty-one billion, forty-four million, four hundred seventy-two thousand, one hundred sixty-eight".