2166043585884 has 48 divisors (see below), whose sum is σ = 5137697832960. Its totient is φ = 710075643840.

The previous prime is 2166043585879. The next prime is 2166043585889. The reversal of 2166043585884 is 4885853406612.

It is an interprime number because it is at equal distance from previous prime (2166043585879) and next prime (2166043585889).

It is a super-2 number, since 2×2166043585884² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166043585889) by changing a digit.

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, 4942357 + ... + 5362739.

It is an arithmetic number, because the mean of its divisors is an integer number (107035371520).

Almost surely, 2^{2166043585884} is an apocalyptic number.

It is an amenable number.

2166043585884 is an abundant number, since it is smaller than the sum of its proper divisors (2971654247076).

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

2166043585884 is a wasteful number, since it uses less digits than its factorization.

2166043585884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427490 (or 427488 counting only the distinct ones).

The product of its (nonzero) digits is 44236800, while the sum is 60.

The spelling of 2166043585884 in words is "two trillion, one hundred sixty-six billion, forty-three million, five hundred eighty-five thousand, eight hundred eighty-four".