31884255656 has 64 divisors (see below), whose sum is σ = 67602332160. Its totient is φ = 13966848000.

The previous prime is 31884255653. The next prime is 31884255707. The reversal of 31884255656 is 65655248813.

It is a junction number, because it is equal to n+sod(n) for n = 31884255598 and 31884255607.

It is not an unprimeable number, because it can be changed into a prime (31884255653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 633200 + ... + 681696.

It is an arithmetic number, because the mean of its divisors is an integer number (1056286440).

Almost surely, 2^31884255656 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 31884255656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33801166080).

31884255656 is an abundant number, since it is smaller than the sum of its proper divisors (35718076504).

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

31884255656 is a wasteful number, since it uses less digits than its factorization.

31884255656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48786 (or 48782 counting only the distinct ones).

The product of its digits is 6912000, while the sum is 53.

The spelling of 31884255656 in words is "thirty-one billion, eight hundred eighty-four million, two hundred fifty-five thousand, six hundred fifty-six".