64636452 has 36 divisors (see below), whose sum is σ = 164842860. Its totient is φ = 21353472.

The previous prime is 64636427. The next prime is 64636469. The reversal of 64636452 is 25463646.

64636452 is a `hidden beast` number, since 6 + 4 + 6 + 3 + 645 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6022116 + 58614336 = 2454^2 + 7656^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3877 + ... + 12012.

Almost surely, 2^64636452 is an apocalyptic number.

It is an amenable number.

64636452 is an abundant number, since it is smaller than the sum of its proper divisors (100206408).

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

64636452 is a wasteful number, since it uses less digits than its factorization.

64636452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16012 (or 16007 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 64636452 is about 8039.6798443719. The cubic root of 64636452 is about 401.3215704866.

It can be divided in two parts, 646364 and 52, that added together give a square (646416 = 804²).

The spelling of 64636452 in words is "sixty-four million, six hundred thirty-six thousand, four hundred fifty-two".