64236816 has 60 divisors (see below), whose sum is σ = 205459072. Its totient is φ = 18353088.

The previous prime is 64236811. The next prime is 64236817. The reversal of 64236816 is 61863246.

64236816 is a `hidden beast` number, since 642 + 3 + 6 + 8 + 1 + 6 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (64236811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30856 + ... + 32871.

Almost surely, 2^64236816 is an apocalyptic number.

It is an amenable number.

64236816 is an abundant number, since it is smaller than the sum of its proper divisors (141222256).

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

64236816 is a wasteful number, since it uses less digits than its factorization.

64236816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63748 (or 63739 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 64236816 is about 8014.7873334231. The cubic root of 64236816 is about 400.4927593879.

The spelling of 64236816 in words is "sixty-four million, two hundred thirty-six thousand, eight hundred sixteen".