64560644 has 12 divisors (see below), whose sum is σ = 113091804. Its totient is φ = 32248704.

The previous prime is 64560607. The next prime is 64560703. The reversal of 64560644 is 44606546.

It can be written as a sum of positive squares in 2 ways, for example, as 33200644 + 31360000 = 5762^2 + 5600^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2969 + ... + 11744.

It is an arithmetic number, because the mean of its divisors is an integer number (9424317).

Almost surely, 2^64560644 is an apocalyptic number.

It is an amenable number.

64560644 is a deficient number, since it is larger than the sum of its proper divisors (48531160).

64560644 is a wasteful number, since it uses less digits than its factorization.

64560644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15814 (or 15812 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 64560644 is about 8034.9638455938. The cubic root of 64560644 is about 401.1646142268.

The spelling of 64560644 in words is "sixty-four million, five hundred sixty thousand, six hundred forty-four".