65812864 has 32 divisors (see below), whose sum is σ = 141200640. Its totient is φ = 30374400.

The previous prime is 65812849. The next prime is 65812871. The reversal of 65812864 is 46821856.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18112 + ... + 21439.

It is an arithmetic number, because the mean of its divisors is an integer number (4412520).

Almost surely, 2^65812864 is an apocalyptic number.

65812864 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

65812864 is an abundant number, since it is smaller than the sum of its proper divisors (75387776).

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

65812864 is a wasteful number, since it uses less digits than its factorization.

65812864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39578 (or 39566 counting only the distinct ones).

The product of its digits is 92160, while the sum is 40.

The square root of 65812864 is about 8112.5128043042. The cubic root of 65812864 is about 403.7416902506.

The spelling of 65812864 in words is "sixty-five million, eight hundred twelve thousand, eight hundred sixty-four".