64512315 has 64 divisors (see below), whose sum is σ = 138009600. Its totient is φ = 27931392.

The previous prime is 64512313. The next prime is 64512323. The reversal of 64512315 is 51321546.

64512315 is a `hidden beast` number, since 645 + 1 + 2 + 3 + 15 = 666.

It is not a de Polignac number, because 64512315 - 2¹ = 64512313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64512313) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16159 + ... + 19751.

It is an arithmetic number, because the mean of its divisors is an integer number (2156400).

Almost surely, 2^64512315 is an apocalyptic number.

64512315 is an abundant number, since it is smaller than the sum of its proper divisors (73497285).

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

64512315 is a wasteful number, since it uses less digits than its factorization.

64512315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3633 (or 3627 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 64512315 is about 8031.9558639226. The cubic root of 64512315 is about 401.0644875693.

The spelling of 64512315 in words is "sixty-four million, five hundred twelve thousand, three hundred fifteen".