11919979115 has 16 divisors (see below), whose sum is σ = 15607010016. Its totient is φ = 8667590400.

The previous prime is 11919979111. The next prime is 11919979129. The reversal of 11919979115 is 51197991911.

It is not a de Polignac number, because 11919979115 - 2² = 11919979111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11919979111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383975 + ... + 413855.

It is an arithmetic number, because the mean of its divisors is an integer number (975438126).

Almost surely, 2^11919979115 is an apocalyptic number.

11919979115 is a deficient number, since it is larger than the sum of its proper divisors (3687030901).

11919979115 is a wasteful number, since it uses less digits than its factorization.

11919979115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37150.

The product of its digits is 229635, while the sum is 53.

The spelling of 11919979115 in words is "eleven billion, nine hundred nineteen million, nine hundred seventy-nine thousand, one hundred fifteen".