72115320306 has 64 divisors (see below), whose sum is σ = 153194227200. Its totient is φ = 22567994496.

The previous prime is 72115320301. The next prime is 72115320311. The reversal of 72115320306 is 60302351127.

It is an interprime number because it is at equal distance from previous prime (72115320301) and next prime (72115320311).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72115320301) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9297726 + ... + 9305478.

It is an arithmetic number, because the mean of its divisors is an integer number (2393659800).

Almost surely, 2^72115320306 is an apocalyptic number.

72115320306 is an abundant number, since it is smaller than the sum of its proper divisors (81078906894).

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

72115320306 is a wasteful number, since it uses less digits than its factorization.

72115320306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8503.

The product of its (nonzero) digits is 7560, while the sum is 30.

The spelling of 72115320306 in words is "seventy-two billion, one hundred fifteen million, three hundred twenty thousand, three hundred six".