64136872 has 16 divisors (see below), whose sum is σ = 120342240. Its totient is φ = 32045616.

The previous prime is 64136867. The next prime is 64136881. The reversal of 64136872 is 27863146.

64136872 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 2×64136872² = 8227076699888768, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18423 + ... + 21625.

It is an arithmetic number, because the mean of its divisors is an integer number (7521390).

Almost surely, 2^64136872 is an apocalyptic number.

It is an amenable number.

64136872 is a deficient number, since it is larger than the sum of its proper divisors (56205368).

64136872 is a wasteful number, since it uses less digits than its factorization.

64136872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5712 (or 5708 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 64136872 is about 8008.5499311673. The cubic root of 64136872 is about 400.2849469649.

The spelling of 64136872 in words is "sixty-four million, one hundred thirty-six thousand, eight hundred seventy-two".