72138414855 has 16 divisors (see below), whose sum is σ = 124300038240. Its totient is φ = 35514296448.

The previous prime is 72138414841. The next prime is 72138414869. The reversal of 72138414855 is 55841483127.

It is an interprime number because it is at equal distance from previous prime (72138414841) and next prime (72138414869).

It is not a de Polignac number, because 72138414855 - 2⁸ = 72138414599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 184970100 + ... + 184970489.

It is an arithmetic number, because the mean of its divisors is an integer number (7768752390).

Almost surely, 2^72138414855 is an apocalyptic number.

72138414855 is a deficient number, since it is larger than the sum of its proper divisors (52161623385).

72138414855 is a wasteful number, since it uses less digits than its factorization.

72138414855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369940610.

The product of its digits is 1075200, while the sum is 48.

The spelling of 72138414855 in words is "seventy-two billion, one hundred thirty-eight million, four hundred fourteen thousand, eight hundred fifty-five".