64512520 has 32 divisors (see below), whose sum is σ = 145566720. Its totient is φ = 25731520.

The previous prime is 64512499. The next prime is 64512521. The reversal of 64512520 is 2521546.

It is not an unprimeable number, because it can be changed into a prime (64512521) 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, 13215 + ... + 17425.

It is an arithmetic number, because the mean of its divisors is an integer number (4548960).

Almost surely, 2^64512520 is an apocalyptic number.

It is an amenable number.

64512520 is an abundant number, since it is smaller than the sum of its proper divisors (81054200).

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

64512520 is a wasteful number, since it uses less digits than its factorization.

64512520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4605 (or 4601 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 64512520 is about 8031.9686254367. The cubic root of 64512520 is about 401.0649123881.

The spelling of 64512520 in words is "sixty-four million, five hundred twelve thousand, five hundred twenty".