72342573121 has 32 divisors (see below), whose sum is σ = 92473622528. Its totient is φ = 55051513920.

The previous prime is 72342573119. The next prime is 72342573179. The reversal of 72342573121 is 12137524327.

It is not a de Polignac number, because 72342573121 - 2¹ = 72342573119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72342573221) 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, 381160 + ... + 538486.

It is an arithmetic number, because the mean of its divisors is an integer number (2889800704).

Almost surely, 2^72342573121 is an apocalyptic number.

It is an amenable number.

72342573121 is a deficient number, since it is larger than the sum of its proper divisors (20131049407).

72342573121 is a wasteful number, since it uses less digits than its factorization.

72342573121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157541.

The product of its digits is 70560, while the sum is 37.

The spelling of 72342573121 in words is "seventy-two billion, three hundred forty-two million, five hundred seventy-three thousand, one hundred twenty-one".