31969312768 has 136 divisors (see below), whose sum is σ = 66588262272. Its totient is φ = 15338569728.

The previous prime is 31969312747. The next prime is 31969312777. The reversal of 31969312768 is 86721396913.

It is a congruent number.

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, 298778571 + ... + 298778677.

Almost surely, 2^31969312768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31969312768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33294131136).

31969312768 is an abundant number, since it is smaller than the sum of its proper divisors (34618949504).

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

31969312768 is an frugal number, since it uses more digits than its factorization.

31969312768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 253 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 55.

The spelling of 31969312768 in words is "thirty-one billion, nine hundred sixty-nine million, three hundred twelve thousand, seven hundred sixty-eight".