31660423504 has 80 divisors (see below), whose sum is σ = 64910131200. Its totient is φ = 14937517440.

The previous prime is 31660423499. The next prime is 31660423511. The reversal of 31660423504 is 40532406613.

It is a self number, because there is not a number n which added to its sum of digits gives 31660423504.

It is a congruent number.

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, 6594897 + ... + 6599695.

It is an arithmetic number, because the mean of its divisors is an integer number (811376640).

Almost surely, 2^31660423504 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 31660423504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32455065600).

31660423504 is an abundant number, since it is smaller than the sum of its proper divisors (33249707696).

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

31660423504 is a wasteful number, since it uses less digits than its factorization.

31660423504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5168 (or 5162 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

The spelling of 31660423504 in words is "thirty-one billion, six hundred sixty million, four hundred twenty-three thousand, five hundred four".