171099779759 has 16 divisors (see below), whose sum is σ = 184163142240. Its totient is φ = 158391367680.

The previous prime is 171099779749. The next prime is 171099779779. The reversal of 171099779759 is 957977990171.

It is a cyclic number.

It is not a de Polignac number, because 171099779759 - 2²⁴ = 171083002543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171099779692 and 171099779701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171099779729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88304 + ... + 591605.

It is an arithmetic number, because the mean of its divisors is an integer number (11510196390).

Almost surely, 2^171099779759 is an apocalyptic number.

171099779759 is a deficient number, since it is larger than the sum of its proper divisors (13063362481).

171099779759 is a wasteful number, since it uses less digits than its factorization.

171099779759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680170.

The product of its (nonzero) digits is 78764805, while the sum is 71.

The spelling of 171099779759 in words is "one hundred seventy-one billion, ninety-nine million, seven hundred seventy-nine thousand, seven hundred fifty-nine".