72724172103 has 24 divisors (see below), whose sum is σ = 114815699856. Its totient is φ = 43990627200.

The previous prime is 72724172093. The next prime is 72724172107. The reversal of 72724172103 is 30127142727.

72724172103 is a `hidden beast` number, since 7 + 27 + 2 + 417 + 210 + 3 = 666.

It is not a de Polignac number, because 72724172103 - 2⁶ = 72724172039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72724172107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 653400 + ... + 756557.

It is an arithmetic number, because the mean of its divisors is an integer number (4783987494).

Almost surely, 2^72724172103 is an apocalyptic number.

72724172103 is a deficient number, since it is larger than the sum of its proper divisors (42091527753).

72724172103 is a wasteful number, since it uses less digits than its factorization.

72724172103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410495 (or 1410492 counting only the distinct ones).

The product of its (nonzero) digits is 32928, while the sum is 36.

The spelling of 72724172103 in words is "seventy-two billion, seven hundred twenty-four million, one hundred seventy-two thousand, one hundred three".