64705136 has 20 divisors (see below), whose sum is σ = 126777600. Its totient is φ = 31988352.

The previous prime is 64705133. The next prime is 64705139. The reversal of 64705136 is 63150746.

It is an interprime number because it is at equal distance from previous prime (64705133) and next prime (64705139).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64705133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21296 + ... + 24143.

It is an arithmetic number, because the mean of its divisors is an integer number (6338880).

Almost surely, 2^64705136 is an apocalyptic number.

It is an amenable number.

64705136 is a deficient number, since it is larger than the sum of its proper divisors (62072464).

64705136 is a wasteful number, since it uses less digits than its factorization.

64705136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45536 (or 45530 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 64705136 is about 8043.9502733421. The cubic root of 64705136 is about 401.4636709689.

The spelling of 64705136 in words is "sixty-four million, seven hundred five thousand, one hundred thirty-six".