72544345315 has 16 divisors (see below), whose sum is σ = 95033863008. Its totient is φ = 52837353216.

The previous prime is 72544345309. The next prime is 72544345319. The reversal of 72544345315 is 51354344527.

It is a cyclic number.

It is not a de Polignac number, because 72544345315 - 2⁵ = 72544345283 is a prime.

It is a super-3 number, since 3×72544345315³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72544345319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7639549 + ... + 7649038.

It is an arithmetic number, because the mean of its divisors is an integer number (5939616438).

Almost surely, 2^72544345315 is an apocalyptic number.

72544345315 is a deficient number, since it is larger than the sum of its proper divisors (22489517693).

72544345315 is a wasteful number, since it uses less digits than its factorization.

72544345315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15288678.

The product of its digits is 1008000, while the sum is 43.

The spelling of 72544345315 in words is "seventy-two billion, five hundred forty-four million, three hundred forty-five thousand, three hundred fifteen".