31939449188 has 12 divisors (see below), whose sum is σ = 55914521712. Its totient is φ = 15963871560.

The previous prime is 31939449137. The next prime is 31939449221. The reversal of 31939449188 is 88194493913.

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, 1450970 + ... + 1472817.

It is an arithmetic number, because the mean of its divisors is an integer number (4659543476).

Almost surely, 2^31939449188 is an apocalyptic number.

It is an amenable number.

31939449188 is a deficient number, since it is larger than the sum of its proper divisors (23975072524).

31939449188 is a wasteful number, since it uses less digits than its factorization.

31939449188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2926522 (or 2926520 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 59.

The spelling of 31939449188 in words is "thirty-one billion, nine hundred thirty-nine million, four hundred forty-nine thousand, one hundred eighty-eight".