251604236260 has 48 divisors (see below), whose sum is σ = 593752352256. Its totient is φ = 88860892032.

The previous prime is 251604236251. The next prime is 251604236309. The reversal of 251604236260 is 62632406152.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21031164 + ... + 21043123.

It is an arithmetic number, because the mean of its divisors is an integer number (12369840672).

Almost surely, 2^251604236260 is an apocalyptic number.

251604236260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251604236260 is an abundant number, since it is smaller than the sum of its proper divisors (342148115996).

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

251604236260 is a wasteful number, since it uses less digits than its factorization.

251604236260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42074332 (or 42074330 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 251604236260 in words is "two hundred fifty-one billion, six hundred four million, two hundred thirty-six thousand, two hundred sixty".