11113566779 has 4 divisors (see below), whose sum is σ = 12701219184. Its totient is φ = 9525914376.

The previous prime is 11113566769. The next prime is 11113566799. The reversal of 11113566779 is 97766531111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11113566779 - 2²⁰ = 11112518203 is a prime.

It is a super-2 number, since 2×11113566779² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11113566769) 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, 793826192 + ... + 793826205.

It is an arithmetic number, because the mean of its divisors is an integer number (3175304796).

Almost surely, 2^11113566779 is an apocalyptic number.

11113566779 is a deficient number, since it is larger than the sum of its proper divisors (1587652405).

11113566779 is an equidigital number, since it uses as much as digits as its factorization.

11113566779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587652404.

The product of its digits is 238140, while the sum is 47.

The spelling of 11113566779 in words is "eleven billion, one hundred thirteen million, five hundred sixty-six thousand, seven hundred seventy-nine".