251676042660 has 72 divisors (see below), whose sum is σ = 872476952256. Its totient is φ = 57525952320.

The previous prime is 251676042619. The next prime is 251676042677. The reversal of 251676042660 is 66240676152.

251676042660 is a `hidden beast` number, since 2 + 5 + 16 + 7 + 604 + 26 + 6 + 0 = 666.

251676042660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 23 ways as a sum of consecutive naturals, for example, 99870186 + ... + 99872705.

It is an arithmetic number, because the mean of its divisors is an integer number (12117735448).

Almost surely, 2^251676042660 is an apocalyptic number.

251676042660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251676042660 is an abundant number, since it is smaller than the sum of its proper divisors (620800909596).

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

251676042660 is a wasteful number, since it uses less digits than its factorization.

251676042660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199742913 (or 199742908 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The spelling of 251676042660 in words is "two hundred fifty-one billion, six hundred seventy-six million, forty-two thousand, six hundred sixty".