18816055644672 has 480 divisors, whose sum is σ = 65002048727616. Its totient is φ = 5163916492800.

The previous prime is 18816055644629. The next prime is 18816055644677. The reversal of 18816055644672 is 27644655061881.

18816055644672 is a `hidden beast` number, since 1 + 8 + 8 + 1 + 6 + 0 + 5 + 564 + 4 + 67 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (18816055644677) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34654647 + ... + 35193417.

Almost surely, 2^{18816055644672} is an apocalyptic number.

18816055644672 is a gapful number since it is divisible by the number (12) 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 18816055644672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32501024363808).

18816055644672 is an abundant number, since it is smaller than the sum of its proper divisors (46185993082944).

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

18816055644672 is a wasteful number, since it uses less digits than its factorization.

18816055644672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538872 (or 538853 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 63.

The spelling of 18816055644672 in words is "eighteen trillion, eight hundred sixteen billion, fifty-five million, six hundred forty-four thousand, six hundred seventy-two".