11813161979 has 8 divisors (see below), whose sum is σ = 12018918912. Its totient is φ = 11609156520.

The previous prime is 11813161961. The next prime is 11813161991. The reversal of 11813161979 is 97916131811.

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 11813161979 - 2¹⁶ = 11813096443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11813167979) 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, 424259 + ... + 451244.

It is an arithmetic number, because the mean of its divisors is an integer number (1502364864).

Almost surely, 2^11813161979 is an apocalyptic number.

11813161979 is a deficient number, since it is larger than the sum of its proper divisors (205756933).

11813161979 is a wasteful number, since it uses less digits than its factorization.

11813161979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875737.

The product of its digits is 81648, while the sum is 47.

The spelling of 11813161979 in words is "eleven billion, eight hundred thirteen million, one hundred sixty-one thousand, nine hundred seventy-nine".