72231655748139 has 12 divisors (see below), whose sum is σ = 104436802523872. Its totient is φ = 48107273166000.

The previous prime is 72231655748123. The next prime is 72231655748167. The reversal of 72231655748139 is 93184755613227.

72231655748139 is a `hidden beast` number, since 7 + 2 + 2 + 3 + 1 + 6 + 557 + 48 + 1 + 39 = 666.

It is not a de Polignac number, because 72231655748139 - 2⁴ = 72231655748123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72231655748639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3930323587 + ... + 3930341964.

Almost surely, 2^{72231655748139} is an apocalyptic number.

72231655748139 is a deficient number, since it is larger than the sum of its proper divisors (32205146775733).

72231655748139 is a wasteful number, since it uses less digits than its factorization.

72231655748139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7860666578 (or 7860666575 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 63.

The spelling of 72231655748139 in words is "seventy-two trillion, two hundred thirty-one billion, six hundred fifty-five million, seven hundred forty-eight thousand, one hundred thirty-nine".