31463981772 has 48 divisors (see below), whose sum is σ = 74176032000. Its totient is φ = 10379505600.

The previous prime is 31463981687. The next prime is 31463981797. The reversal of 31463981772 is 27718936413.

It is a happy number.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3654729 + ... + 3663327.

It is an arithmetic number, because the mean of its divisors is an integer number (1545334000).

Almost surely, 2^31463981772 is an apocalyptic number.

It is an amenable number.

31463981772 is an abundant number, since it is smaller than the sum of its proper divisors (42712050228).

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

31463981772 is a wasteful number, since it uses less digits than its factorization.

31463981772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11726 (or 11724 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 51.

The spelling of 31463981772 in words is "thirty-one billion, four hundred sixty-three million, nine hundred eighty-one thousand, seven hundred seventy-two".