18559129827216 has 80 divisors (see below), whose sum is σ = 55379649457728. Its totient is φ = 5293156454400.

The previous prime is 18559129827209. The next prime is 18559129827239. The reversal of 18559129827216 is 61272892195581.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1033810645 + ... + 1033828596.

Almost surely, 2^{18559129827216} is an apocalyptic number.

18559129827216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18559129827216 is an abundant number, since it is smaller than the sum of its proper divisors (36820519630512).

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

18559129827216 is a wasteful number, since it uses less digits than its factorization.

18559129827216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2067639280 (or 2067639274 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 66.

The spelling of 18559129827216 in words is "eighteen trillion, five hundred fifty-nine billion, one hundred twenty-nine million, eight hundred twenty-seven thousand, two hundred sixteen".