64516536 has 72 divisors (see below), whose sum is σ = 203271120. Its totient is φ = 18432288.

The previous prime is 64516531. The next prime is 64516537. The reversal of 64516536 is 63561546.

64516536 is a `hidden beast` number, since 645 + 1 + 6 + 5 + 3 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

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 64516536.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64516531) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5616 + ... + 12671.

It is an arithmetic number, because the mean of its divisors is an integer number (2823210).

Almost surely, 2^64516536 is an apocalyptic number.

It is an amenable number.

64516536 is an abundant number, since it is smaller than the sum of its proper divisors (138754584).

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

64516536 is a wasteful number, since it uses less digits than its factorization.

64516536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18313 (or 18299 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 64516536 is about 8032.2186225227. The cubic root of 64516536 is about 401.0732345105.

The spelling of 64516536 in words is "sixty-four million, five hundred sixteen thousand, five hundred thirty-six".