31439044128 has 24 divisors (see below), whose sum is σ = 82527491088. Its totient is φ = 10479681344.

The previous prime is 31439044097. The next prime is 31439044177. The reversal of 31439044128 is 82144093413.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163744926 + ... + 163745117.

It is an arithmetic number, because the mean of its divisors is an integer number (3438645462).

Almost surely, 2^31439044128 is an apocalyptic number.

It is an amenable number.

31439044128 is an abundant number, since it is smaller than the sum of its proper divisors (51088446960).

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

31439044128 is a wasteful number, since it uses less digits than its factorization.

31439044128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327490056 (or 327490048 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 31439044128 in words is "thirty-one billion, four hundred thirty-nine million, forty-four thousand, one hundred twenty-eight".