65631213656 has 32 divisors (see below), whose sum is σ = 124673850000. Its totient is φ = 32387661696.

The previous prime is 65631213643. The next prime is 65631213673.

65631213656 is nontrivially palindromic in base 10.

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, 11795 + ... + 362493.

Almost surely, 2^65631213656 is an apocalyptic number.

It is an amenable number.

65631213656 is a deficient number, since it is larger than the sum of its proper divisors (59042636344).

65631213656 is a wasteful number, since it uses less digits than its factorization.

65631213656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351011 (or 351007 counting only the distinct ones).

The product of its digits is 583200, while the sum is 44.

The spelling of 65631213656 in words is "sixty-five billion, six hundred thirty-one million, two hundred thirteen thousand, six hundred fifty-six".