11691358177 has 6 divisors (see below), whose sum is σ = 11701832018. Its totient is φ = 11680891152.

The previous prime is 11691358123. The next prime is 11691358181. The reversal of 11691358177 is 77185319611.

It can be written as a sum of positive squares in only one way, i.e., 7090313616 + 4601044561 = 84204^2 + 67831^2 .

It is not a de Polignac number, because 11691358177 - 2¹⁵ = 11691325409 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 11691358177.

It is not an unprimeable number, because it can be changed into a prime (11691358277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4997274 + ... + 4999612.

Almost surely, 2^11691358177 is an apocalyptic number.

It is an amenable number.

11691358177 is a deficient number, since it is larger than the sum of its proper divisors (10473841).

11691358177 is an frugal number, since it uses more digits than its factorization.

11691358177 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6815 (or 4476 counting only the distinct ones).

The product of its digits is 317520, while the sum is 49.

The spelling of 11691358177 in words is "eleven billion, six hundred ninety-one million, three hundred fifty-eight thousand, one hundred seventy-seven".