11991876899 has 8 divisors (see below), whose sum is σ = 12249661440. Its totient is φ = 11734202376.

The previous prime is 11991876893. The next prime is 11991876907. The reversal of 11991876899 is 99867819911.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11991876899 - 2³² = 7696909603 is a prime.

It is a super-2 number, since 2×11991876899² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11991876893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215672 + ... + 265514.

It is an arithmetic number, because the mean of its divisors is an integer number (1531207680).

Almost surely, 2^11991876899 is an apocalyptic number.

11991876899 is a deficient number, since it is larger than the sum of its proper divisors (257784541).

11991876899 is an equidigital number, since it uses as much as digits as its factorization.

11991876899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55009.

The product of its digits is 17635968, while the sum is 68.

The spelling of 11991876899 in words is "eleven billion, nine hundred ninety-one million, eight hundred seventy-six thousand, eight hundred ninety-nine".