31794985644 has 48 divisors (see below), whose sum is σ = 74908643040. Its totient is φ = 10495526400.

The previous prime is 31794985639. The next prime is 31794985657. The reversal of 31794985644 is 44658949713.

It is a super-2 number, since 2×31794985644² (a number of 22 digits) contains 22 as substring.

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, 2993944 + ... + 3004544.

It is an arithmetic number, because the mean of its divisors is an integer number (1560596730).

Almost surely, 2^31794985644 is an apocalyptic number.

It is an amenable number.

31794985644 is an abundant number, since it is smaller than the sum of its proper divisors (43113657396).

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

31794985644 is a wasteful number, since it uses less digits than its factorization.

31794985644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13010 (or 13008 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 60.

The spelling of 31794985644 in words is "thirty-one billion, seven hundred ninety-four million, nine hundred eighty-five thousand, six hundred forty-four".