72139913919 has 6 divisors (see below), whose sum is σ = 104202097896. Its totient is φ = 48093275940.

The previous prime is 72139913827. The next prime is 72139913971. The reversal of 72139913919 is 91931993127.

It is not a de Polignac number, because 72139913919 - 2¹¹ = 72139911871 is a prime.

It is a super-2 number, since 2×72139913919² (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 (72139903919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4007772987 + ... + 4007773004.

It is an arithmetic number, because the mean of its divisors is an integer number (17367016316).

Almost surely, 2^72139913919 is an apocalyptic number.

72139913919 is a deficient number, since it is larger than the sum of its proper divisors (32062183977).

72139913919 is a wasteful number, since it uses less digits than its factorization.

72139913919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8015545997 (or 8015545994 counting only the distinct ones).

The product of its digits is 826686, while the sum is 54.

The spelling of 72139913919 in words is "seventy-two billion, one hundred thirty-nine million, nine hundred thirteen thousand, nine hundred nineteen".