2166894501888 has 224 divisors, whose sum is σ = 6143798004480. Its totient is φ = 676934451200.

The previous prime is 2166894501883. The next prime is 2166894501901. The reversal of 2166894501888 is 8881054986612.

It is not an unprimeable number, because it can be changed into a prime (2166894501883) 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, 99841438 + ... + 99863138.

Almost surely, 2^{2166894501888} 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 2166894501888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3071899002240).

2166894501888 is an abundant number, since it is smaller than the sum of its proper divisors (3976903502592).

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

2166894501888 is a wasteful number, since it uses less digits than its factorization.

2166894501888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21986 (or 21962 counting only the distinct ones).

The product of its (nonzero) digits is 53084160, while the sum is 66.

The spelling of 2166894501888 in words is "two trillion, one hundred sixty-six billion, eight hundred ninety-four million, five hundred one thousand, eight hundred eighty-eight".