65731940964 has 30 divisors (see below), whose sum is σ = 171836278614. Its totient is φ = 21910646880.

The previous prime is 65731940881. The next prime is 65731941001. The reversal of 65731940964 is 46904913756.

65731940964 is a `hidden beast` number, since 6 + 573 + 1 + 9 + 4 + 0 + 9 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 35340992064 + 30390948900 = 187992^2 + 174330^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 65731940964.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 101437857 + ... + 101438504.

Almost surely, 2^65731940964 is an apocalyptic number.

It is an amenable number.

65731940964 is an abundant number, since it is smaller than the sum of its proper divisors (106104337650).

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

65731940964 is a wasteful number, since it uses less digits than its factorization.

65731940964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202876377 (or 202876366 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 65731940964 in words is "sixty-five billion, seven hundred thirty-one million, nine hundred forty thousand, nine hundred sixty-four".