64516856 has 32 divisors (see below), whose sum is σ = 130310400. Its totient is φ = 29846880.

The previous prime is 64516843. The next prime is 64516877. The reversal of 64516856 is 65861546.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1601 + ... + 11471.

It is an arithmetic number, because the mean of its divisors is an integer number (4072200).

Almost surely, 2^64516856 is an apocalyptic number.

It is an amenable number.

64516856 is an abundant number, since it is smaller than the sum of its proper divisors (65793544).

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

64516856 is a wasteful number, since it uses less digits than its factorization.

64516856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9939 (or 9935 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 64516856 is about 8032.2385422745. The cubic root of 64516856 is about 401.0738976130.

The spelling of 64516856 in words is "sixty-four million, five hundred sixteen thousand, eight hundred fifty-six".