31899769368 has 16 divisors (see below), whose sum is σ = 79749423480. Its totient is φ = 10633256448.

The previous prime is 31899769367. The next prime is 31899769399. The reversal of 31899769368 is 86396799813.

It is a super-2 number, since 2×31899769368² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31899769367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664578505 + ... + 664578552.

Almost surely, 2^31899769368 is an apocalyptic number.

It is an amenable number.

31899769368 is an abundant number, since it is smaller than the sum of its proper divisors (47849654112).

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

31899769368 is a wasteful number, since it uses less digits than its factorization.

31899769368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329157066 (or 1329157062 counting only the distinct ones).

The product of its digits is 105815808, while the sum is 69.

The spelling of 31899769368 in words is "thirty-one billion, eight hundred ninety-nine million, seven hundred sixty-nine thousand, three hundred sixty-eight".