31655664712 has 32 divisors (see below), whose sum is σ = 68025772800. Its totient is φ = 13528272384.

The previous prime is 31655664683. The next prime is 31655664749. The reversal of 31655664712 is 21746655613.

It is a super-2 number, since 2×31655664712² (a number of 22 digits) contains 22 as substring.

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, 780912 + ... + 820447.

It is an arithmetic number, because the mean of its divisors is an integer number (2125805400).

Almost surely, 2^31655664712 is an apocalyptic number.

It is an amenable number.

31655664712 is an abundant number, since it is smaller than the sum of its proper divisors (36370108088).

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

31655664712 is a wasteful number, since it uses less digits than its factorization.

31655664712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601725 (or 1601721 counting only the distinct ones).

The product of its digits is 907200, while the sum is 46.

Subtracting from 31655664712 its reverse (21746655613), we obtain a palindrome (9909009099).

The spelling of 31655664712 in words is "thirty-one billion, six hundred fifty-five million, six hundred sixty-four thousand, seven hundred twelve".