31613067616 has 48 divisors (see below), whose sum is σ = 70553473200. Its totient is φ = 13822714368.

The previous prime is 31613067601. The next prime is 31613067631. The reversal of 31613067616 is 61676031613.

It is an interprime number because it is at equal distance from previous prime (31613067601) and next prime (31613067631).

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, 1991911 + ... + 2007718.

It is an arithmetic number, because the mean of its divisors is an integer number (1469864025).

Almost surely, 2^31613067616 is an apocalyptic number.

It is an amenable number.

31613067616 is an abundant number, since it is smaller than the sum of its proper divisors (38940405584).

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

31613067616 is a wasteful number, since it uses less digits than its factorization.

31613067616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3999671 (or 3999663 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 40.

The spelling of 31613067616 in words is "thirty-one billion, six hundred thirteen million, sixty-seven thousand, six hundred sixteen".