18615598768 has 60 divisors (see below), whose sum is σ = 39089239200. Its totient is φ = 8584412928.

The previous prime is 18615598709. The next prime is 18615598847. The reversal of 18615598768 is 86789551681.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4278258 + ... + 4282606.

It is an arithmetic number, because the mean of its divisors is an integer number (651487320).

Almost surely, 2^18615598768 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 18615598768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19544619600).

18615598768 is an abundant number, since it is smaller than the sum of its proper divisors (20473640432).

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

18615598768 is a wasteful number, since it uses less digits than its factorization.

18615598768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966 (or 5947 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 64.

The spelling of 18615598768 in words is "eighteen billion, six hundred fifteen million, five hundred ninety-eight thousand, seven hundred sixty-eight".