31491134956 has 12 divisors (see below), whose sum is σ = 56282028768. Its totient is φ = 15410555312.

The previous prime is 31491134929. The next prime is 31491134971. The reversal of 31491134956 is 65943119413.

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 3 ways as a sum of consecutive naturals, for example, 83752831 + ... + 83753206.

It is an arithmetic number, because the mean of its divisors is an integer number (4690169064).

Almost surely, 2^31491134956 is an apocalyptic number.

It is an amenable number.

31491134956 is a deficient number, since it is larger than the sum of its proper divisors (24790893812).

31491134956 is a wasteful number, since it uses less digits than its factorization.

31491134956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167506088 (or 167506086 counting only the distinct ones).

The product of its digits is 349920, while the sum is 46.

The spelling of 31491134956 in words is "thirty-one billion, four hundred ninety-one million, one hundred thirty-four thousand, nine hundred fifty-six".