11557048189 has 4 divisors (see below), whose sum is σ = 11775105756. Its totient is φ = 11338990624.

The previous prime is 11557048159. The next prime is 11557048213. The reversal of 11557048189 is 98184075511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98184075511 = 25933 ⋅3786067.

It can be written as a sum of positive squares in 2 ways, for example, as 8164568164 + 3392480025 = 90358^2 + 58245^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11557048189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11557048159) 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, 109028704 + ... + 109028809.

It is an arithmetic number, because the mean of its divisors is an integer number (2943776439).

Almost surely, 2^11557048189 is an apocalyptic number.

It is an amenable number.

11557048189 is a deficient number, since it is larger than the sum of its proper divisors (218057567).

11557048189 is an equidigital number, since it uses as much as digits as its factorization.

11557048189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218057566.

The product of its (nonzero) digits is 403200, while the sum is 49.

The spelling of 11557048189 in words is "eleven billion, five hundred fifty-seven million, forty-eight thousand, one hundred eighty-nine".