11779412089 has 3 divisors (see below), whose sum is σ = 11779520623. Its totient is φ = 11779303556.

The previous prime is 11779412069. The next prime is 11779412111. The reversal of 11779412089 is 98021497711.

The square root of 11779412089 is 108533.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 181845225 + 11597566864 = 13485^2 + 107692^2 .

It is not a de Polignac number, because 11779412089 - 2²⁵ = 11745857657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11779412069) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 54267 + ... + 162799.

Almost surely, 2^11779412089 is an apocalyptic number.

11779412089 is the 108533-rd square number.

11779412089 is the 54267-th centered octagonal number.

It is an amenable number.

11779412089 is a deficient number, since it is larger than the sum of its proper divisors (108534).

11779412089 is an frugal number, since it uses more digits than its factorization.

11779412089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217066 (or 108533 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 49.

Multiplying 11779412089 by its sum of digits (49), we get a square (577191192361 = 759731²).

The spelling of 11779412089 in words is "eleven billion, seven hundred seventy-nine million, four hundred twelve thousand, eighty-nine".