72139422399 has 32 divisors (see below), whose sum is σ = 107273984256. Its totient is φ = 42753765120.

The previous prime is 72139422379. The next prime is 72139422449. The reversal of 72139422399 is 99322493127.

It is not a de Polignac number, because 72139422399 - 2¹² = 72139418303 is a prime.

It is a super-2 number, since 2×72139422399² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72139422379) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183829 + ... + 421985.

It is an arithmetic number, because the mean of its divisors is an integer number (3352312008).

Almost surely, 2^72139422399 is an apocalyptic number.

72139422399 is a deficient number, since it is larger than the sum of its proper divisors (35134561857).

72139422399 is a wasteful number, since it uses less digits than its factorization.

72139422399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238375.

The product of its digits is 1469664, while the sum is 51.

The spelling of 72139422399 in words is "seventy-two billion, one hundred thirty-nine million, four hundred twenty-two thousand, three hundred ninety-nine".