172116717665 has 8 divisors (see below), whose sum is σ = 206579576448. Its totient is φ = 137667030640.

The previous prime is 172116717649. The next prime is 172116717679. The reversal of 172116717665 is 566717611271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172116717665 - 2⁴ = 172116717649 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3264167 + ... + 3316476.

It is an arithmetic number, because the mean of its divisors is an integer number (25822447056).

Almost surely, 2^172116717665 is an apocalyptic number.

It is an amenable number.

172116717665 is a deficient number, since it is larger than the sum of its proper divisors (34462858783).

172116717665 is an equidigital number, since it uses as much as digits as its factorization.

172116717665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6585879.

The product of its digits is 740880, while the sum is 50.

The spelling of 172116717665 in words is "one hundred seventy-two billion, one hundred sixteen million, seven hundred seventeen thousand, six hundred sixty-five".