18479777218568 has 64 divisors (see below), whose sum is σ = 36279042912000. Its totient is φ = 8813109376512.

The previous prime is 18479777218549. The next prime is 18479777218577. The reversal of 18479777218568 is 86581277797481.

It is a junction number, because it is equal to n+sod(n) for n = 18479777218492 and 18479777218501.

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, 324993596 + ... + 325050452.

It is an arithmetic number, because the mean of its divisors is an integer number (566860045500).

Almost surely, 2^{18479777218568} is an apocalyptic number.

It is an amenable number.

18479777218568 is a deficient number, since it is larger than the sum of its proper divisors (17799265693432).

18479777218568 is a wasteful number, since it uses less digits than its factorization.

18479777218568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73854 (or 73850 counting only the distinct ones).

The product of its digits is 2655313920, while the sum is 80.

The spelling of 18479777218568 in words is "eighteen trillion, four hundred seventy-nine billion, seven hundred seventy-seven million, two hundred eighteen thousand, five hundred sixty-eight".