72720231245 has 16 divisors (see below), whose sum is σ = 87748365312. Its totient is φ = 57853650240.

The previous prime is 72720231211. The next prime is 72720231293. The reversal of 72720231245 is 54213202727.

It is not a de Polignac number, because 72720231245 - 2²⁸ = 72451795789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3669734 + ... + 3689496.

It is an arithmetic number, because the mean of its divisors is an integer number (5484272832).

Almost surely, 2^72720231245 is an apocalyptic number.

It is an amenable number.

72720231245 is a deficient number, since it is larger than the sum of its proper divisors (15028134067).

72720231245 is a wasteful number, since it uses less digits than its factorization.

72720231245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23812.

The product of its (nonzero) digits is 47040, while the sum is 35.

The spelling of 72720231245 in words is "seventy-two billion, seven hundred twenty million, two hundred thirty-one thousand, two hundred forty-five".