172009337291105 has 4 divisors (see below), whose sum is σ = 206411204749332. Its totient is φ = 137607469832880.

The previous prime is 172009337291083. The next prime is 172009337291111. The reversal of 172009337291105 is 501192733900271.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83253361451584 + 88755975839521 = 9124328^2 + 9421039^2 .

It is not a de Polignac number, because 172009337291105 - 2⁸ = 172009337290849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17200933729106 + ... + 17200933729115.

It is an arithmetic number, because the mean of its divisors is an integer number (51602801187333).

Almost surely, 2^{172009337291105} is an apocalyptic number.

It is an amenable number.

172009337291105 is a deficient number, since it is larger than the sum of its proper divisors (34401867458227).

172009337291105 is an equidigital number, since it uses as much as digits as its factorization.

172009337291105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34401867458226.

The product of its (nonzero) digits is 714420, while the sum is 50.

The spelling of 172009337291105 in words is "one hundred seventy-two trillion, nine billion, three hundred thirty-seven million, two hundred ninety-one thousand, one hundred five".