31186979912 has 32 divisors (see below), whose sum is σ = 64093917600. Its totient is φ = 14108707200.

The previous prime is 31186979909. The next prime is 31186979953. The reversal of 31186979912 is 21997968113.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821237 + ... + 858372.

It is an arithmetic number, because the mean of its divisors is an integer number (2002934925).

Almost surely, 2^31186979912 is an apocalyptic number.

It is an amenable number.

31186979912 is an abundant number, since it is smaller than the sum of its proper divisors (32906937688).

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

31186979912 is a wasteful number, since it uses less digits than its factorization.

31186979912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679837 (or 1679833 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 56.

The spelling of 31186979912 in words is "thirty-one billion, one hundred eighty-six million, nine hundred seventy-nine thousand, nine hundred twelve".