11840980911 has 16 divisors (see below), whose sum is σ = 16628385024. Its totient is φ = 7480197824.

The previous prime is 11840980903. The next prime is 11840980919. The reversal of 11840980911 is 11908904811.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11840980903) and next prime (11840980919).

It is a cyclic number.

It is not a de Polignac number, because 11840980911 - 2³ = 11840980903 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11840980919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 794526 + ... + 809291.

It is an arithmetic number, because the mean of its divisors is an integer number (1039274064).

Almost surely, 2^11840980911 is an apocalyptic number.

11840980911 is a deficient number, since it is larger than the sum of its proper divisors (4787404113).

11840980911 is a wasteful number, since it uses less digits than its factorization.

11840980911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603950.

The product of its (nonzero) digits is 20736, while the sum is 42.

The spelling of 11840980911 in words is "eleven billion, eight hundred forty million, nine hundred eighty thousand, nine hundred eleven".