72724172147 has 16 divisors (see below), whose sum is σ = 82077235200. Its totient is φ = 63837580800.

The previous prime is 72724172141. The next prime is 72724172173. The reversal of 72724172147 is 74127142727.

It is not a de Polignac number, because 72724172147 - 2²⁴ = 72707394931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72724172098 and 72724172107.

It is not an unprimeable number, because it can be changed into a prime (72724172141) 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, 84383 + ... + 390600.

It is an arithmetic number, because the mean of its divisors is an integer number (5129827200).

Almost surely, 2^72724172147 is an apocalyptic number.

72724172147 is a deficient number, since it is larger than the sum of its proper divisors (9353063053).

72724172147 is a wasteful number, since it uses less digits than its factorization.

72724172147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475474.

The product of its digits is 307328, while the sum is 44.

The spelling of 72724172147 in words is "seventy-two billion, seven hundred twenty-four million, one hundred seventy-two thousand, one hundred forty-seven".