72139125136 has 40 divisors (see below), whose sum is σ = 152641105344. Its totient is φ = 32826030720.

The previous prime is 72139125127. The next prime is 72139125211. The reversal of 72139125136 is 63152193127.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2427646 + ... + 2457181.

Almost surely, 2^72139125136 is an apocalyptic number.

It is an amenable number.

72139125136 is an abundant number, since it is smaller than the sum of its proper divisors (80501980208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72139125136 is a wasteful number, since it uses less digits than its factorization.

72139125136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4884919 (or 4884913 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The spelling of 72139125136 in words is "seventy-two billion, one hundred thirty-nine million, one hundred twenty-five thousand, one hundred thirty-six".