11771172553 has 8 divisors (see below), whose sum is σ = 14037671808. Its totient is φ = 9650899104.

The previous prime is 11771172509. The next prime is 11771172571. The reversal of 11771172553 is 35527117711.

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

It is not a de Polignac number, because 11771172553 - 2²⁵ = 11737618121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11771172583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36556276 + ... + 36556597.

It is an arithmetic number, because the mean of its divisors is an integer number (1754708976).

Almost surely, 2^11771172553 is an apocalyptic number.

It is an amenable number.

11771172553 is a deficient number, since it is larger than the sum of its proper divisors (2266499255).

11771172553 is an equidigital number, since it uses as much as digits as its factorization.

11771172553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73112903.

The product of its digits is 51450, while the sum is 40.

The spelling of 11771172553 in words is "eleven billion, seven hundred seventy-one million, one hundred seventy-two thousand, five hundred fifty-three".