11111123456779 has 32 divisors (see below), whose sum is σ = 11673714401280. Its totient is φ = 10566012377088.

The previous prime is 11111123456743. The next prime is 11111123456801. The reversal of 11111123456779 is 97765432111111.

It is a cyclic number.

It is not a de Polignac number, because 11111123456779 - 2⁷ = 11111123456651 is a prime.

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 (11111123456179) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 89938219 + ... + 90061675.

It is an arithmetic number, because the mean of its divisors is an integer number (364803575040).

Almost surely, 2^{11111123456779} is an apocalyptic number.

11111123456779 is a deficient number, since it is larger than the sum of its proper divisors (562590944501).

11111123456779 is a wasteful number, since it uses less digits than its factorization.

11111123456779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123907.

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

The spelling of 11111123456779 in words is "eleven trillion, one hundred eleven billion, one hundred twenty-three million, four hundred fifty-six thousand, seven hundred seventy-nine".