31605679764 has 48 divisors (see below), whose sum is σ = 81954512640. Its totient is φ = 10533444480.

The previous prime is 31605679739. The next prime is 31605679811. The reversal of 31605679764 is 46797650613.

It is a happy number.

31605679764 is a `hidden beast` number, since 3 + 1 + 6 + 0 + 567 + 9 + 76 + 4 = 666.

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 31605679764.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 719884 + ... + 762524.

It is an arithmetic number, because the mean of its divisors is an integer number (1707385680).

Almost surely, 2^31605679764 is an apocalyptic number.

It is an amenable number.

31605679764 is an abundant number, since it is smaller than the sum of its proper divisors (50348832876).

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

31605679764 is a wasteful number, since it uses less digits than its factorization.

31605679764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49517 (or 49509 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 54.

The spelling of 31605679764 in words is "thirty-one billion, six hundred five million, six hundred seventy-nine thousand, seven hundred sixty-four".