64372536 has 32 divisors (see below), whose sum is σ = 178813200. Its totient is φ = 21457440.

The previous prime is 64372493. The next prime is 64372537. The reversal of 64372536 is 63527346.

64372536 is a `hidden beast` number, since 643 + 7 + 2 + 5 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 64372536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64372537) 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, 148795 + ... + 149226.

Almost surely, 2^64372536 is an apocalyptic number.

It is an amenable number.

64372536 is an abundant number, since it is smaller than the sum of its proper divisors (114440664).

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

64372536 is a wasteful number, since it uses less digits than its factorization.

64372536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298036 (or 298026 counting only the distinct ones).

The product of its digits is 90720, while the sum is 36.

The square root of 64372536 is about 8023.2497156701. The cubic root of 64372536 is about 400.7746156249.

The spelling of 64372536 in words is "sixty-four million, three hundred seventy-two thousand, five hundred thirty-six".