65540317864 has 32 divisors (see below), whose sum is σ = 141255371520. Its totient is φ = 27926341056.

The previous prime is 65540317849. The next prime is 65540317873. The reversal of 65540317864 is 46871304556.

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, 3372864 + ... + 3392239.

It is an arithmetic number, because the mean of its divisors is an integer number (4414230360).

Almost surely, 2^65540317864 is an apocalyptic number.

It is an amenable number.

65540317864 is an abundant number, since it is smaller than the sum of its proper divisors (75715053656).

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

65540317864 is a wasteful number, since it uses less digits than its factorization.

65540317864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6765289 (or 6765285 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 65540317864 in words is "sixty-five billion, five hundred forty million, three hundred seventeen thousand, eight hundred sixty-four".