64705536 has 264 divisors, whose sum is σ = 229919040. Its totient is φ = 17104896.

The previous prime is 64705523. The next prime is 64705573. The reversal of 64705536 is 63550746.

64705536 is a `hidden beast` number, since 647 + 0 + 5 + 5 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64705536.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1096675 + ... + 1096733.

Almost surely, 2^64705536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64705536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114959520).

64705536 is an abundant number, since it is smaller than the sum of its proper divisors (165213504).

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

64705536 is a wasteful number, since it uses less digits than its factorization.

64705536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 64705536 is about 8043.9751367095. The cubic root of 64705536 is about 401.4644982352.

It can be divided in two parts, 64 and 705536, that added together give a square (705600 = 840²).

The spelling of 64705536 in words is "sixty-four million, seven hundred five thousand, five hundred thirty-six".