2166921903279 has 16 divisors (see below), whose sum is σ = 3304916586752. Its totient is φ = 1237138455168.

The previous prime is 2166921903271. The next prime is 2166921903281. The reversal of 2166921903279 is 9723091296612.

It is not a de Polignac number, because 2166921903279 - 2³ = 2166921903271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166921903271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45918874 + ... + 45966039.

It is an arithmetic number, because the mean of its divisors is an integer number (206557286672).

Almost surely, 2^{2166921903279} is an apocalyptic number.

2166921903279 is a deficient number, since it is larger than the sum of its proper divisors (1137994683473).

2166921903279 is a wasteful number, since it uses less digits than its factorization.

2166921903279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91886046.

The product of its (nonzero) digits is 4408992, while the sum is 57.

The spelling of 2166921903279 in words is "two trillion, one hundred sixty-six billion, nine hundred twenty-one million, nine hundred three thousand, two hundred seventy-nine".