64136610856 has 32 divisors (see below), whose sum is σ = 120962983680. Its totient is φ = 31880275200.

The previous prime is 64136610847. The next prime is 64136610887. The reversal of 64136610856 is 65801663146.

64136610856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64136610856² (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 7 ways as a sum of consecutive naturals, for example, 1103401 + ... + 1160071.

It is an arithmetic number, because the mean of its divisors is an integer number (3780093240).

Almost surely, 2^64136610856 is an apocalyptic number.

It is an amenable number.

64136610856 is a deficient number, since it is larger than the sum of its proper divisors (56826372824).

64136610856 is a wasteful number, since it uses less digits than its factorization.

64136610856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57505 (or 57501 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 64136610856 in words is "sixty-four billion, one hundred thirty-six million, six hundred ten thousand, eight hundred fifty-six".