64537812 has 36 divisors (see below), whose sum is σ = 165110400. Its totient is φ = 21252432.

The previous prime is 64537807. The next prime is 64537819. The reversal of 64537812 is 21873546.

64537812 is a `hidden beast` number, since 645 + 3 + 7 + 8 + 1 + 2 = 666.

64537812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64537819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7812 + ... + 13787.

It is an arithmetic number, because the mean of its divisors is an integer number (4586400).

Almost surely, 2^64537812 is an apocalyptic number.

It is an amenable number.

64537812 is an abundant number, since it is smaller than the sum of its proper divisors (100572588).

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

64537812 is a wasteful number, since it uses less digits than its factorization.

64537812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21692 (or 21687 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 64537812 is about 8033.5429294926. The cubic root of 64537812 is about 401.1173177633.

The spelling of 64537812 in words is "sixty-four million, five hundred thirty-seven thousand, eight hundred twelve".