31611394984 has 64 divisors (see below), whose sum is σ = 66082544640. Its totient is φ = 14083683840.

The previous prime is 31611394981. The next prime is 31611395033. The reversal of 31611394984 is 48949311613.

It is not an unprimeable number, because it can be changed into a prime (31611394981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312529 + ... + 401119.

It is an arithmetic number, because the mean of its divisors is an integer number (1032539760).

Almost surely, 2^31611394984 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 31611394984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33041272320).

31611394984 is an abundant number, since it is smaller than the sum of its proper divisors (34471149656).

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

31611394984 is a wasteful number, since it uses less digits than its factorization.

31611394984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88730 (or 88726 counting only the distinct ones).

The product of its digits is 559872, while the sum is 49.

The spelling of 31611394984 in words is "thirty-one billion, six hundred eleven million, three hundred ninety-four thousand, nine hundred eighty-four".