31678715432 has 128 divisors (see below), whose sum is σ = 74163048960. Its totient is φ = 12352020480.

The previous prime is 31678715423. The next prime is 31678715507. The reversal of 31678715432 is 23451787613.

It is a happy number.

It is a super-2 number, since 2×31678715432² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18070268 + ... + 18072020.

It is an arithmetic number, because the mean of its divisors is an integer number (579398820).

Almost surely, 2^31678715432 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 31678715432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37081524480).

31678715432 is an abundant number, since it is smaller than the sum of its proper divisors (42484333528).

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

31678715432 is a wasteful number, since it uses less digits than its factorization.

31678715432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2123 (or 2119 counting only the distinct ones).

The product of its digits is 846720, while the sum is 47.

The spelling of 31678715432 in words is "thirty-one billion, six hundred seventy-eight million, seven hundred fifteen thousand, four hundred thirty-two".