31269857856 has 28 divisors (see below), whose sum is σ = 82734832752. Its totient is φ = 10423285888.

The previous prime is 31269857837. The next prime is 31269857891. The reversal of 31269857856 is 65875896213.

It is a self number, because there is not a number n which added to its sum of digits gives 31269857856.

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, 81431730 + ... + 81432113.

Almost surely, 2^31269857856 is an apocalyptic number.

It is an amenable number.

31269857856 is an abundant number, since it is smaller than the sum of its proper divisors (51464974896).

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

31269857856 is a wasteful number, since it uses less digits than its factorization.

31269857856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162863858 (or 162863848 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 60.

The spelling of 31269857856 in words is "thirty-one billion, two hundred sixty-nine million, eight hundred fifty-seven thousand, eight hundred fifty-six".