72924918025 has 12 divisors (see below), whose sum is σ = 90521814492. Its totient is φ = 58278698240.

The previous prime is 72924918019. The next prime is 72924918049. The reversal of 72924918025 is 52081942927.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1212362761 + 71712555264 = 34819^2 + 267792^2 .

It is not a de Polignac number, because 72924918025 - 2¹¹ = 72924915977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72924918025.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1506604 + ... + 1554253.

It is an arithmetic number, because the mean of its divisors is an integer number (7543484541).

Almost surely, 2^72924918025 is an apocalyptic number.

It is an amenable number.

72924918025 is a deficient number, since it is larger than the sum of its proper divisors (17596896467).

72924918025 is a wasteful number, since it uses less digits than its factorization.

72924918025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061820 (or 3061815 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 72924918025 in words is "seventy-two billion, nine hundred twenty-four million, nine hundred eighteen thousand, twenty-five".