64564236 has 48 divisors (see below), whose sum is σ = 182609280. Its totient is φ = 19564560.

The previous prime is 64564219. The next prime is 64564271. The reversal of 64564236 is 63246546.

64564236 is a `hidden beast` number, since 6 + 4 + 5 + 642 + 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 64564236.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25986 + ... + 28361.

It is an arithmetic number, because the mean of its divisors is an integer number (3804360).

Almost surely, 2^64564236 is an apocalyptic number.

64564236 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

64564236 is an abundant number, since it is smaller than the sum of its proper divisors (118045044).

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

64564236 is a wasteful number, since it uses less digits than its factorization.

64564236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54371 (or 54363 counting only the distinct ones).

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

The square root of 64564236 is about 8035.1873655815. The cubic root of 64564236 is about 401.1720540357.

The spelling of 64564236 in words is "sixty-four million, five hundred sixty-four thousand, two hundred thirty-six".