31995395472 has 80 divisors (see below), whose sum is σ = 83945787840. Its totient is φ = 10498768896.

The previous prime is 31995395447. The next prime is 31995395491. The reversal of 31995395472 is 27459359913.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6844528 + ... + 6849200.

It is an arithmetic number, because the mean of its divisors is an integer number (1049322348).

Almost surely, 2^31995395472 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 31995395472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41972893920).

31995395472 is an abundant number, since it is smaller than the sum of its proper divisors (51950392368).

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

31995395472 is a wasteful number, since it uses less digits than its factorization.

31995395472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6880 (or 6874 counting only the distinct ones).

The product of its digits is 9185400, while the sum is 57.

The spelling of 31995395472 in words is "thirty-one billion, nine hundred ninety-five million, three hundred ninety-five thousand, four hundred seventy-two".