172013326657 has 2 divisors, whose sum is σ = 172013326658. Its totient is φ = 172013326656.

The previous prime is 172013326627. The next prime is 172013326663. The reversal of 172013326657 is 756623310271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87145401616 + 84867925041 = 295204^2 + 291321^2 .

It is a cyclic number.

It is not a de Polignac number, because 172013326657 - 2¹⁵ = 172013293889 is a prime.

It is not a weakly prime, because it can be changed into another prime (172013326627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86006663328 + 86006663329.

It is an arithmetic number, because the mean of its divisors is an integer number (86006663329).

Almost surely, 2^172013326657 is an apocalyptic number.

It is an amenable number.

172013326657 is a deficient number, since it is larger than the sum of its proper divisors (1).

172013326657 is an equidigital number, since it uses as much as digits as its factorization.

172013326657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 317520, while the sum is 43.

The spelling of 172013326657 in words is "one hundred seventy-two billion, thirteen million, three hundred twenty-six thousand, six hundred fifty-seven".