64904712936 has 64 divisors (see below), whose sum is σ = 186670202880. Its totient is φ = 18421387200.

The previous prime is 64904712883. The next prime is 64904712997. The reversal of 64904712936 is 63921740946.

It is a happy number.

It is a super-2 number, since 2×64904712936² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1253896 + ... + 1304631.

It is an arithmetic number, because the mean of its divisors is an integer number (2916721920).

Almost surely, 2^64904712936 is an apocalyptic number.

It is an amenable number.

64904712936 is an abundant number, since it is smaller than the sum of its proper divisors (121765489944).

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

64904712936 is a wasteful number, since it uses less digits than its factorization.

64904712936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558694 (or 2558690 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 64904712936 in words is "sixty-four billion, nine hundred four million, seven hundred twelve thousand, nine hundred thirty-six".