18456785689 has 8 divisors (see below), whose sum is σ = 19283080320. Its totient is φ = 17632476576.

The previous prime is 18456785657. The next prime is 18456785701. The reversal of 18456785689 is 98658765481.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18456785689 - 2⁵ = 18456785657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18456785629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477357 + ... + 514570.

It is an arithmetic number, because the mean of its divisors is an integer number (2410385040).

Almost surely, 2^18456785689 is an apocalyptic number.

It is an amenable number.

18456785689 is a deficient number, since it is larger than the sum of its proper divisors (826294631).

18456785689 is an equidigital number, since it uses as much as digits as its factorization.

18456785689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992759.

The product of its digits is 116121600, while the sum is 67.

The spelling of 18456785689 in words is "eighteen billion, four hundred fifty-six million, seven hundred eighty-five thousand, six hundred eighty-nine".