18188739806216 has 192 divisors, whose sum is σ = 42789841228800. Its totient is φ = 7079845253760.

The previous prime is 18188739806047. The next prime is 18188739806227. The reversal of 18188739806216 is 61260893788181.

It is a super-4 number, since 4×18188739806216⁴ (a number of 54 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109324805 + ... + 109491051.

It is an arithmetic number, because the mean of its divisors is an integer number (222863756400).

Almost surely, 2^{18188739806216} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18188739806216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21394920614400).

18188739806216 is an abundant number, since it is smaller than the sum of its proper divisors (24601101422584).

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

18188739806216 is a wasteful number, since it uses less digits than its factorization.

18188739806216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166448 (or 166413 counting only the distinct ones).

The product of its (nonzero) digits is 55738368, while the sum is 68.

The spelling of 18188739806216 in words is "eighteen trillion, one hundred eighty-eight billion, seven hundred thirty-nine million, eight hundred six thousand, two hundred sixteen".