31144991948 has 12 divisors (see below), whose sum is σ = 62289983952. Its totient is φ = 13347853680.

The previous prime is 31144991897. The next prime is 31144991951. The reversal of 31144991948 is 84919944113.

It is a happy number.

31144991948 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 31144991948.

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, 556160543 + ... + 556160598.

It is an arithmetic number, because the mean of its divisors is an integer number (5190831996).

Almost surely, 2^31144991948 is an apocalyptic number.

It is an amenable number.

31144991948 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31144991948 is a wasteful number, since it uses less digits than its factorization.

31144991948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112321152 (or 1112321150 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 53.

The spelling of 31144991948 in words is "thirty-one billion, one hundred forty-four million, nine hundred ninety-one thousand, nine hundred forty-eight".