172160259209 has 2 divisors, whose sum is σ = 172160259210. Its totient is φ = 172160259208.

The previous prime is 172160259179. The next prime is 172160259329. The reversal of 172160259209 is 902952061271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141547507984 + 30612751225 = 376228^2 + 174965^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172160259209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 172160259209.

It is not a weakly prime, because it can be changed into another prime (172160259109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86080129604 + 86080129605.

It is an arithmetic number, because the mean of its divisors is an integer number (86080129605).

Almost surely, 2^172160259209 is an apocalyptic number.

It is an amenable number.

172160259209 is a deficient number, since it is larger than the sum of its proper divisors (1).

172160259209 is an equidigital number, since it uses as much as digits as its factorization.

172160259209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 172160259209 in words is "one hundred seventy-two billion, one hundred sixty million, two hundred fifty-nine thousand, two hundred nine".