18216180456 has 64 divisors (see below), whose sum is σ = 45836668800. Its totient is φ = 6032683008.

The previous prime is 18216180427. The next prime is 18216180473. The reversal of 18216180456 is 65408161281.

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, 2719960 + ... + 2726648.

It is an arithmetic number, because the mean of its divisors is an integer number (716197950).

Almost surely, 2^18216180456 is an apocalyptic number.

It is an amenable number.

18216180456 is an abundant number, since it is smaller than the sum of its proper divisors (27620488344).

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

18216180456 is a wasteful number, since it uses less digits than its factorization.

18216180456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7418 (or 7414 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 18216180456 in words is "eighteen billion, two hundred sixteen million, one hundred eighty thousand, four hundred fifty-six".