31071539968 has 144 divisors (see below), whose sum is σ = 72148817664. Its totient is φ = 13080637440.

The previous prime is 31071539957. The next prime is 31071540083. The reversal of 31071539968 is 86993517013.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25117846 + ... + 25119082.

It is an arithmetic number, because the mean of its divisors is an integer number (501033456).

Almost surely, 2^31071539968 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 31071539968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36074408832).

31071539968 is an abundant number, since it is smaller than the sum of its proper divisors (41077277696).

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

31071539968 is a wasteful number, since it uses less digits than its factorization.

31071539968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498 (or 1484 counting only the distinct ones).

The product of its (nonzero) digits is 1224720, while the sum is 52.

The spelling of 31071539968 in words is "thirty-one billion, seventy-one million, five hundred thirty-nine thousand, nine hundred sixty-eight".