172117747751 has 8 divisors (see below), whose sum is σ = 189053819520. Its totient is φ = 155969400312.

The previous prime is 172117747687. The next prime is 172117747757. The reversal of 172117747751 is 157747711271.

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

It is a cyclic number.

It is not a de Polignac number, because 172117747751 - 2⁶ = 172117747687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172117747751.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172117747757) 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 in 7 ways as a sum of consecutive naturals, for example, 196930625 + ... + 196931498.

It is an arithmetic number, because the mean of its divisors is an integer number (23631727440).

Almost surely, 2^172117747751 is an apocalyptic number.

172117747751 is a deficient number, since it is larger than the sum of its proper divisors (16936071769).

172117747751 is a wasteful number, since it uses less digits than its factorization.

172117747751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393862165.

The product of its digits is 672280, while the sum is 50.

The spelling of 172117747751 in words is "one hundred seventy-two billion, one hundred seventeen million, seven hundred forty-seven thousand, seven hundred fifty-one".