11779573818 has 32 divisors (see below), whose sum is σ = 23834062080. Its totient is φ = 3880743680.

The previous prime is 11779573801. The next prime is 11779573831. The reversal of 11779573818 is 81837597711.

It is a super-2 number, since 2×11779573818² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2249263 + ... + 2254493.

It is an arithmetic number, because the mean of its divisors is an integer number (744814440).

Almost surely, 2^11779573818 is an apocalyptic number.

11779573818 is an abundant number, since it is smaller than the sum of its proper divisors (12054488262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11779573818 is a wasteful number, since it uses less digits than its factorization.

11779573818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9542.

The product of its digits is 2963520, while the sum is 57.

The spelling of 11779573818 in words is "eleven billion, seven hundred seventy-nine million, five hundred seventy-three thousand, eight hundred eighteen".