172711601761 has 4 divisors (see below), whose sum is σ = 172735862724. Its totient is φ = 172687340800.

The previous prime is 172711601749. The next prime is 172711601807. The reversal of 172711601761 is 167106117271.

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 48353811025 + 124357790736 = 219895^2 + 352644^2 .

It is a cyclic number.

It is not a de Polignac number, because 172711601761 - 2¹⁷ = 172711470689 is a prime.

It is a super-2 number, since 2×172711601761² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172711601261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12119800 + ... + 12134041.

It is an arithmetic number, because the mean of its divisors is an integer number (43183965681).

Almost surely, 2^172711601761 is an apocalyptic number.

It is an amenable number.

172711601761 is a deficient number, since it is larger than the sum of its proper divisors (24260963).

172711601761 is an equidigital number, since it uses as much as digits as its factorization.

172711601761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24260962.

The product of its (nonzero) digits is 24696, while the sum is 40.

The spelling of 172711601761 in words is "one hundred seventy-two billion, seven hundred eleven million, six hundred one thousand, seven hundred sixty-one".