18456785688 has 128 divisors (see below), whose sum is σ = 51184742400. Its totient is φ = 5499177600.

The previous prime is 18456785657. The next prime is 18456785701. The reversal of 18456785688 is 88658765481.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8227495 + ... + 8229737.

It is an arithmetic number, because the mean of its divisors is an integer number (399880800).

Almost surely, 2^18456785688 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 18456785688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25592371200).

18456785688 is an abundant number, since it is smaller than the sum of its proper divisors (32727956712).

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

18456785688 is a wasteful number, since it uses less digits than its factorization.

18456785688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2773 (or 2769 counting only the distinct ones).

The product of its digits is 103219200, while the sum is 66.

The spelling of 18456785688 in words is "eighteen billion, four hundred fifty-six million, seven hundred eighty-five thousand, six hundred eighty-eight".