18266080616 has 64 divisors (see below), whose sum is σ = 41226864000. Its totient is φ = 7411772160.

The previous prime is 18266080607. The next prime is 18266080649. The reversal of 18266080616 is 61608066281.

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, 2154626 + ... + 2163086.

It is an arithmetic number, because the mean of its divisors is an integer number (644169750).

Almost surely, 2^18266080616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18266080616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20613432000).

18266080616 is an abundant number, since it is smaller than the sum of its proper divisors (22960783384).

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

18266080616 is a wasteful number, since it uses less digits than its factorization.

18266080616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10522 (or 10518 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The spelling of 18266080616 in words is "eighteen billion, two hundred sixty-six million, eighty thousand, six hundred sixteen".