31549119872 has 48 divisors (see below), whose sum is σ = 65703400980. Its totient is φ = 15088677120.

The previous prime is 31549119857. The next prime is 31549119881. The reversal of 31549119872 is 27891194513.

It is a self number, because there is not a number n which added to its sum of digits gives 31549119872.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 165254 + ... + 300677.

Almost surely, 2^31549119872 is an apocalyptic number.

31549119872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31549119872 is an abundant number, since it is smaller than the sum of its proper divisors (34154281108).

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

31549119872 is an equidigital number, since it uses as much as digits as its factorization.

31549119872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465991 (or 465956 counting only the distinct ones).

The product of its digits is 544320, while the sum is 50.

The spelling of 31549119872 in words is "thirty-one billion, five hundred forty-nine million, one hundred nineteen thousand, eight hundred seventy-two".