18359166016 has 21 divisors (see below), whose sum is σ = 36433621189. Its totient is φ = 9179041024.

The previous prime is 18359165989. The next prime is 18359166061. The reversal of 18359166016 is 61066195381.

The square root of 18359166016 is 135496.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 6368040000 + 11991126016 = 79800^2 + 109504^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1075500 + ... + 1092436.

Almost surely, 2^18359166016 is an apocalyptic number.

18359166016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

18359166016 is the 135496-th square number.

It is an amenable number.

18359166016 is a deficient number, since it is larger than the sum of its proper divisors (18074455173).

18359166016 is an frugal number, since it uses more digits than its factorization.

18359166016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33886 (or 16939 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 46.

The spelling of 18359166016 in words is "eighteen billion, three hundred fifty-nine million, one hundred sixty-six thousand, sixteen".