32721872160 has 48 divisors (see below), whose sum is σ = 103073898816. Its totient is φ = 8725832448.

The previous prime is 32721872159. The next prime is 32721872167. The reversal of 32721872160 is 6127812723.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (32721872167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34084804 + ... + 34085763.

It is an arithmetic number, because the mean of its divisors is an integer number (2147372892).

Almost surely, 2^32721872160 is an apocalyptic number.

32721872160 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

32721872160 is an abundant number, since it is smaller than the sum of its proper divisors (70352026656).

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

32721872160 is a wasteful number, since it uses less digits than its factorization.

32721872160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68170585 (or 68170577 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The spelling of 32721872160 in words is "thirty-two billion, seven hundred twenty-one million, eight hundred seventy-two thousand, one hundred sixty".