11889022779 has 20 divisors (see below), whose sum is σ = 18694892040. Its totient is φ = 7508855520.

The previous prime is 11889022771. The next prime is 11889022781. The reversal of 11889022779 is 97722098811.

It is not a de Polignac number, because 11889022779 - 2³ = 11889022771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11889022771) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3861042 + ... + 3864119.

It is an arithmetic number, because the mean of its divisors is an integer number (934744602).

Almost surely, 2^11889022779 is an apocalyptic number.

11889022779 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

11889022779 is a deficient number, since it is larger than the sum of its proper divisors (6805869261).

11889022779 is an equidigital number, since it uses as much as digits as its factorization.

11889022779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7725192 (or 7725183 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 54.

The spelling of 11889022779 in words is "eleven billion, eight hundred eighty-nine million, twenty-two thousand, seven hundred seventy-nine".