72182737538 has 24 divisors (see below), whose sum is σ = 109177076988. Its totient is φ = 35792441952.

The previous prime is 72182737519. The next prime is 72182737553. The reversal of 72182737538 is 83573728127.

It can be written as a sum of positive squares in 2 ways, for example, as 66800020849 + 5382716689 = 258457^2 + 73367^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 72182737538.

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, 29139956 + ... + 29142432.

Almost surely, 2^72182737538 is an apocalyptic number.

72182737538 is a deficient number, since it is larger than the sum of its proper divisors (36994339450).

72182737538 is a wasteful number, since it uses less digits than its factorization.

72182737538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218 (or 2995 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 53.

The spelling of 72182737538 in words is "seventy-two billion, one hundred eighty-two million, seven hundred thirty-seven thousand, five hundred thirty-eight".