64704560 has 40 divisors (see below), whose sum is σ = 154115136. Its totient is φ = 25249280.

The previous prime is 64704517. The next prime is 64704569. The reversal of 64704560 is 6540746.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (64704569) 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, 6584 + ... + 13143.

Almost surely, 2^64704560 is an apocalyptic number.

It is an amenable number.

64704560 is an abundant number, since it is smaller than the sum of its proper divisors (89410576).

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

64704560 is a wasteful number, since it uses less digits than its factorization.

64704560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19781 (or 19775 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 64704560 is about 8043.9144699580. The cubic root of 64704560 is about 401.4624796994.

The spelling of 64704560 in words is "sixty-four million, seven hundred four thousand, five hundred sixty".