72744255315 has 24 divisors (see below), whose sum is σ = 126123339888. Its totient is φ = 38786690880.

The previous prime is 72744255257. The next prime is 72744255317. The reversal of 72744255315 is 51355244727.

72744255315 is a `hidden beast` number, since 7 + 2 + 74 + 42 + 5 + 531 + 5 = 666.

It is not a de Polignac number, because 72744255315 - 2²¹ = 72742158163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (72744255317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39589 + ... + 383478.

It is an arithmetic number, because the mean of its divisors is an integer number (5255139162).

Almost surely, 2^72744255315 is an apocalyptic number.

72744255315 is a deficient number, since it is larger than the sum of its proper divisors (53379084573).

72744255315 is a wasteful number, since it uses less digits than its factorization.

72744255315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426899 (or 426896 counting only the distinct ones).

The product of its digits is 1176000, while the sum is 45.

The spelling of 72744255315 in words is "seventy-two billion, seven hundred forty-four million, two hundred fifty-five thousand, three hundred fifteen".