65631864136 has 16 divisors (see below), whose sum is σ = 124745496300. Its totient is φ = 32366398464.

The previous prime is 65631864119. The next prime is 65631864149. The reversal of 65631864136 is 63146813656.

It can be written as a sum of positive squares in 2 ways, for example, as 65203622500 + 428241636 = 255350^2 + 20694^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65631864136.

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, 56191081 + ... + 56192248.

Almost surely, 2^65631864136 is an apocalyptic number.

It is an amenable number.

65631864136 is a deficient number, since it is larger than the sum of its proper divisors (59113632164).

65631864136 is a wasteful number, since it uses less digits than its factorization.

65631864136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112383408 (or 112383404 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 49.

The spelling of 65631864136 in words is "sixty-five billion, six hundred thirty-one million, eight hundred sixty-four thousand, one hundred thirty-six".