31630945544 has 16 divisors (see below), whose sum is σ = 64699661520. Its totient is φ = 14377702480.

The previous prime is 31630945537. The next prime is 31630945559. The reversal of 31630945544 is 44554903613.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 31630945495 and 31630945504.

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 3 ways as a sum of consecutive naturals, for example, 179721194 + ... + 179721369.

It is an arithmetic number, because the mean of its divisors is an integer number (4043728845).

Almost surely, 2^31630945544 is an apocalyptic number.

It is an amenable number.

31630945544 is an abundant number, since it is smaller than the sum of its proper divisors (33068715976).

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

31630945544 is a wasteful number, since it uses less digits than its factorization.

31630945544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359442580 (or 359442576 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 31630945544 in words is "thirty-one billion, six hundred thirty million, nine hundred forty-five thousand, five hundred forty-four".