64536723 has 8 divisors (see below), whose sum is σ = 95610000. Its totient is φ = 43024464.

The previous prime is 64536713. The next prime is 64536739. The reversal of 64536723 is 32763546.

64536723 is a `hidden beast` number, since 645 + 3 + 6 + 7 + 2 + 3 = 666.

It is not a de Polignac number, because 64536723 - 2⁴ = 64536707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64536713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1195098 + ... + 1195151.

It is an arithmetic number, because the mean of its divisors is an integer number (11951250).

Almost surely, 2^64536723 is an apocalyptic number.

64536723 is a deficient number, since it is larger than the sum of its proper divisors (31073277).

64536723 is a wasteful number, since it uses less digits than its factorization.

64536723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390258 (or 2390252 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 64536723 is about 8033.4751508920. The cubic root of 64536723 is about 401.1150616222.

The spelling of 64536723 in words is "sixty-four million, five hundred thirty-six thousand, seven hundred twenty-three".