64672520 has 32 divisors (see below), whose sum is σ = 158742720. Its totient is φ = 23517120.

The previous prime is 64672513. The next prime is 64672529. The reversal of 64672520 is 2527646.

64672520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (64672529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73052 + ... + 73931.

It is an arithmetic number, because the mean of its divisors is an integer number (4960710).

Almost surely, 2^64672520 is an apocalyptic number.

It is an amenable number.

64672520 is an abundant number, since it is smaller than the sum of its proper divisors (94070200).

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

64672520 is a wasteful number, since it uses less digits than its factorization.

64672520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147005 (or 147001 counting only the distinct ones).

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

The square root of 64672520 is about 8041.9226556838. The cubic root of 64672520 is about 401.3962041976.

The spelling of 64672520 in words is "sixty-four million, six hundred seventy-two thousand, five hundred twenty".