18644222244681 has 96 divisors (see below), whose sum is σ = 30911149248000. Its totient is φ = 11094981337440.

The previous prime is 18644222244581. The next prime is 18644222244691.

18644222244681 is a `hidden beast` number, since 1 + 8 + 64 + 42 + 2 + 22 + 446 + 81 = 666.

18644222244681 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 18644222244681 - 2¹⁴ = 18644222228297 is a prime.

It is a super-2 number, since 2×18644222244681² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18644222244691) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 165518526 + ... + 165631128.

It is an arithmetic number, because the mean of its divisors is an integer number (321991138000).

Almost surely, 2^{18644222244681} is an apocalyptic number.

18644222244681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18644222244681 is a deficient number, since it is larger than the sum of its proper divisors (12266927003319).

18644222244681 is a wasteful number, since it uses less digits than its factorization.

18644222244681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113552 (or 113535 counting only the distinct ones).

The product of its digits is 9437184, while the sum is 54.

The spelling of 18644222244681 in words is "eighteen trillion, six hundred forty-four billion, two hundred twenty-two million, two hundred forty-four thousand, six hundred eighty-one".