64544872 has 32 divisors (see below), whose sum is σ = 142053120. Its totient is φ = 26913600.

The previous prime is 64544827. The next prime is 64544873. The reversal of 64544872 is 27844546.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64544873) 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, 13504 + ... + 17647.

It is an arithmetic number, because the mean of its divisors is an integer number (4439160).

Almost surely, 2^64544872 is an apocalyptic number.

It is an amenable number.

64544872 is an abundant number, since it is smaller than the sum of its proper divisors (77508248).

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

64544872 is a wasteful number, since it uses less digits than its factorization.

64544872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31201 (or 31197 counting only the distinct ones).

The product of its digits is 215040, while the sum is 40.

The square root of 64544872 is about 8033.9823250988. The cubic root of 64544872 is about 401.1319437369.

The spelling of 64544872 in words is "sixty-four million, five hundred forty-four thousand, eight hundred seventy-two".