64118756936 has 16 divisors (see below), whose sum is σ = 129470567100. Its totient is φ = 29593272384.

The previous prime is 64118756929. The next prime is 64118756957. The reversal of 64118756936 is 63965781146.

It can be written as a sum of positive squares in 2 ways, for example, as 53404436836 + 10714320100 = 231094^2 + 103510^2 .

It is a super-2 number, since 2×64118756936² (a number of 22 digits) contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 308263151 + ... + 308263358.

Almost surely, 2^64118756936 is an apocalyptic number.

It is an amenable number.

64118756936 is an abundant number, since it is smaller than the sum of its proper divisors (65351810164).

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

64118756936 is a wasteful number, since it uses less digits than its factorization.

64118756936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616526528 (or 616526524 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 56.

The spelling of 64118756936 in words is "sixty-four billion, one hundred eighteen million, seven hundred fifty-six thousand, nine hundred thirty-six".