18608163840 has 264 divisors, whose sum is σ = 73689052320. Its totient is φ = 4253220864.

The previous prime is 18608163793. The next prime is 18608163853. The reversal of 18608163840 is 4836180681.

It is a happy number.

18608163840 is a `hidden beast` number, since 1 + 8 + 6 + 0 + 8 + 1 + 638 + 4 + 0 = 666.

It is a super-3 number, since 3×18608163840³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 293716 + ... + 351404.

Almost surely, 2^18608163840 is an apocalyptic number.

18608163840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18608163840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36844526160).

18608163840 is an abundant number, since it is smaller than the sum of its proper divisors (55080888480).

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

18608163840 is a wasteful number, since it uses less digits than its factorization.

18608163840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57727 (or 57706 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 18608163840 in words is "eighteen billion, six hundred eight million, one hundred sixty-three thousand, eight hundred forty".