32161393992 has 128 divisors (see below), whose sum is σ = 99109704960. Its totient is φ = 8469135360.

The previous prime is 32161393969. The next prime is 32161393997. The reversal of 32161393992 is 29939316123.

It is not an unprimeable number, because it can be changed into a prime (32161393997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1458892 + ... + 1480772.

It is an arithmetic number, because the mean of its divisors is an integer number (774294570).

Almost surely, 2^32161393992 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 32161393992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49554852480).

32161393992 is an abundant number, since it is smaller than the sum of its proper divisors (66948310968).

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

32161393992 is a wasteful number, since it uses less digits than its factorization.

32161393992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22583 (or 22579 counting only the distinct ones).

The product of its digits is 472392, while the sum is 48.

The spelling of 32161393992 in words is "thirty-two billion, one hundred sixty-one million, three hundred ninety-three thousand, nine hundred ninety-two".