18472725566 has 16 divisors (see below), whose sum is σ = 29177107200. Its totient is φ = 8747344728.

The previous prime is 18472725533. The next prime is 18472725571. The reversal of 18472725566 is 66552727481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38315 + ... + 195993.

It is an arithmetic number, because the mean of its divisors is an integer number (1823569200).

Almost surely, 2^18472725566 is an apocalyptic number.

18472725566 is a deficient number, since it is larger than the sum of its proper divisors (10704381634).

18472725566 is a wasteful number, since it uses less digits than its factorization.

18472725566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160783.

The product of its digits is 5644800, while the sum is 53.

The spelling of 18472725566 in words is "eighteen billion, four hundred seventy-two million, seven hundred twenty-five thousand, five hundred sixty-six".