72489329177 has 2 divisors, whose sum is σ = 72489329178. Its totient is φ = 72489329176.

The previous prime is 72489329119. The next prime is 72489329197. The reversal of 72489329177 is 77192398427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64507872256 + 7981456921 = 253984^2 + 89339^2 .

It is an emirp because it is prime and its reverse (77192398427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72489329177 - 2²⁸ = 72220893721 is a prime.

It is not a weakly prime, because it can be changed into another prime (72489329197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36244664588 + 36244664589.

It is an arithmetic number, because the mean of its divisors is an integer number (36244664589).

Almost surely, 2^72489329177 is an apocalyptic number.

It is an amenable number.

72489329177 is a deficient number, since it is larger than the sum of its proper divisors (1).

72489329177 is an equidigital number, since it uses as much as digits as its factorization.

72489329177 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10668672, while the sum is 59.

The spelling of 72489329177 in words is "seventy-two billion, four hundred eighty-nine million, three hundred twenty-nine thousand, one hundred seventy-seven".