31613916620 has 48 divisors (see below), whose sum is σ = 77995739808. Its totient is φ = 10611663360.

The previous prime is 31613916619. The next prime is 31613916641. The reversal of 31613916620 is 2661931613.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5524049 + ... + 5529768.

It is an arithmetic number, because the mean of its divisors is an integer number (1624911246).

Almost surely, 2^31613916620 is an apocalyptic number.

It is an amenable number.

31613916620 is an abundant number, since it is smaller than the sum of its proper divisors (46381823188).

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

31613916620 is a wasteful number, since it uses less digits than its factorization.

31613916620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11053850 (or 11053848 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The spelling of 31613916620 in words is "thirty-one billion, six hundred thirteen million, nine hundred sixteen thousand, six hundred twenty".