18279216778896 has 80 divisors (see below), whose sum is σ = 52699259620800. Its totient is φ = 6066230499072.

The previous prime is 18279216778873. The next prime is 18279216778897. The reversal of 18279216778896 is 69887761297281.

18279216778896 is a `hidden beast` number, since 182 + 79 + 216 + 7 + 78 + 8 + 96 = 666.

It is not an unprimeable number, because it can be changed into a prime (18279216778897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93102381 + ... + 93298508.

It is an arithmetic number, because the mean of its divisors is an integer number (658740745260).

Almost surely, 2^{18279216778896} is an apocalyptic number.

18279216778896 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18279216778896 is an abundant number, since it is smaller than the sum of its proper divisors (34420042841904).

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

18279216778896 is a wasteful number, since it uses less digits than its factorization.

18279216778896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186401133 (or 186401121 counting only the distinct ones).

The product of its digits is 2048385024, while the sum is 81.

The spelling of 18279216778896 in words is "eighteen trillion, two hundred seventy-nine billion, two hundred sixteen million, seven hundred seventy-eight thousand, eight hundred ninety-six".