72178579238 has 4 divisors (see below), whose sum is σ = 108267868860. Its totient is φ = 36089289618.

The previous prime is 72178579237. The next prime is 72178579279. The reversal of 72178579238 is 83297587127.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72178579237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18044644808 + ... + 18044644811.

It is an arithmetic number, because the mean of its divisors is an integer number (27066967215).

Almost surely, 2^72178579238 is an apocalyptic number.

72178579238 is a deficient number, since it is larger than the sum of its proper divisors (36089289622).

72178579238 is a wasteful number, since it uses less digits than its factorization.

72178579238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36089289621.

The product of its digits is 11854080, while the sum is 59.

The spelling of 72178579238 in words is "seventy-two billion, one hundred seventy-eight million, five hundred seventy-nine thousand, two hundred thirty-eight".