11671172885 has 8 divisors (see below), whose sum is σ = 14383932216. Its totient is φ = 9084588480.

The previous prime is 11671172837. The next prime is 11671172893. The reversal of 11671172885 is 58827117611.

It can be written as a sum of positive squares in 4 ways, for example, as 2775287761 + 8895885124 = 52681^2 + 94318^2 .

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

It is not a de Polignac number, because 11671172885 - 2²⁸ = 11402737429 is a prime.

It is a Duffinian number.

It is a congruent 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, 31543526 + ... + 31543895.

It is an arithmetic number, because the mean of its divisors is an integer number (1797991527).

Almost surely, 2^11671172885 is an apocalyptic number.

It is an amenable number.

11671172885 is a deficient number, since it is larger than the sum of its proper divisors (2712759331).

11671172885 is an equidigital number, since it uses as much as digits as its factorization.

11671172885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63087463.

The product of its digits is 188160, while the sum is 47.

The spelling of 11671172885 in words is "eleven billion, six hundred seventy-one million, one hundred seventy-two thousand, eight hundred eighty-five".