72178579279 has 2 divisors, whose sum is σ = 72178579280. Its totient is φ = 72178579278.

The previous prime is 72178579237. The next prime is 72178579289. The reversal of 72178579279 is 97297587127.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72178579279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72178579279.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72178579289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36089289639 + 36089289640.

It is an arithmetic number, because the mean of its divisors is an integer number (36089289640).

Almost surely, 2^72178579279 is an apocalyptic number.

72178579279 is a deficient number, since it is larger than the sum of its proper divisors (1).

72178579279 is an equidigital number, since it uses as much as digits as its factorization.

72178579279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31116960, while the sum is 64.

The spelling of 72178579279 in words is "seventy-two billion, one hundred seventy-eight million, five hundred seventy-nine thousand, two hundred seventy-nine".