64568736 has 36 divisors (see below), whose sum is σ = 183618162. Its totient is φ = 21522816.

The previous prime is 64568723. The next prime is 64568759. The reversal of 64568736 is 63786546.

It can be written as a sum of positive squares in only one way, i.e., 52707600 + 11861136 = 7260^2 + 3444^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 64568691 and 64568700.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111811 + ... + 112386.

Almost surely, 2^64568736 is an apocalyptic number.

It is an amenable number.

64568736 is an abundant number, since it is smaller than the sum of its proper divisors (119049426).

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

64568736 is a wasteful number, since it uses less digits than its factorization.

64568736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224213 (or 224202 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 64568736 is about 8035.4673790639. The cubic root of 64568736 is about 401.1813741197.

The spelling of 64568736 in words is "sixty-four million, five hundred sixty-eight thousand, seven hundred thirty-six".