253138082568 has 64 divisors (see below), whose sum is σ = 723639121920. Its totient is φ = 72286420800.

The previous prime is 253138082557. The next prime is 253138082573. The reversal of 253138082568 is 865280831352.

It is a self number, because there is not a number n which added to its sum of digits gives 253138082568.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88338 + ... + 716993.

It is an arithmetic number, because the mean of its divisors is an integer number (11306861280).

Almost surely, 2^253138082568 is an apocalyptic number.

253138082568 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

253138082568 is an abundant number, since it is smaller than the sum of its proper divisors (470501039352).

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

253138082568 is a wasteful number, since it uses less digits than its factorization.

253138082568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807218 (or 807214 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 51.

The spelling of 253138082568 in words is "two hundred fifty-three billion, one hundred thirty-eight million, eighty-two thousand, five hundred sixty-eight".