31469585992 has 48 divisors (see below), whose sum is σ = 63936408240. Its totient is φ = 14514671808.

The previous prime is 31469585897. The next prime is 31469585993. The reversal of 31469585992 is 29958596413.

It is a self number, because there is not a number n which added to its sum of digits gives 31469585992.

It is not an unprimeable number, because it can be changed into a prime (31469585993) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2246803 + ... + 2260765.

It is an arithmetic number, because the mean of its divisors is an integer number (1332008505).

Almost surely, 2^31469585992 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 31469585992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31968204120).

31469585992 is an abundant number, since it is smaller than the sum of its proper divisors (32466822248).

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

31469585992 is a wasteful number, since it uses less digits than its factorization.

31469585992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15662 (or 15645 counting only the distinct ones).

The product of its digits is 20995200, while the sum is 61.

The spelling of 31469585992 in words is "thirty-one billion, four hundred sixty-nine million, five hundred eighty-five thousand, nine hundred ninety-two".