18616876656 has 160 divisors (see below), whose sum is σ = 57151104000. Its totient is φ = 5109350400.

The previous prime is 18616876651. The next prime is 18616876661. The reversal of 18616876656 is 65667861681.

It is an interprime number because it is at equal distance from previous prime (18616876651) and next prime (18616876661).

It is a self number, because there is not a number n which added to its sum of digits gives 18616876656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18616876651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1934256 + ... + 1943856.

It is an arithmetic number, because the mean of its divisors is an integer number (357194400).

Almost surely, 2^18616876656 is an apocalyptic number.

18616876656 is a gapful number since it is divisible by the number (16) 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 18616876656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28575552000).

18616876656 is an abundant number, since it is smaller than the sum of its proper divisors (38534227344).

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

18616876656 is a wasteful number, since it uses less digits than its factorization.

18616876656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9847 (or 9841 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 60.

The spelling of 18616876656 in words is "eighteen billion, six hundred sixteen million, eight hundred seventy-six thousand, six hundred fifty-six".