172330848721 has 2 divisors, whose sum is σ = 172330848722. Its totient is φ = 172330848720.

The previous prime is 172330848709. The next prime is 172330848779. The reversal of 172330848721 is 127848033271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150147725121 + 22183123600 = 387489^2 + 148940^2 .

It is a cyclic number.

It is not a de Polignac number, because 172330848721 - 2⁵ = 172330848689 is a prime.

It is not a weakly prime, because it can be changed into another prime (172330842721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86165424360 + 86165424361.

It is an arithmetic number, because the mean of its divisors is an integer number (86165424361).

Almost surely, 2^172330848721 is an apocalyptic number.

It is an amenable number.

172330848721 is a deficient number, since it is larger than the sum of its proper divisors (1).

172330848721 is an equidigital number, since it uses as much as digits as its factorization.

172330848721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 172330848721 in words is "one hundred seventy-two billion, three hundred thirty million, eight hundred forty-eight thousand, seven hundred twenty-one".