2166301365256 has 48 divisors (see below), whose sum is σ = 4751365165200. Its totient is φ = 923228165664.

The previous prime is 2166301365211. The next prime is 2166301365299. The reversal of 2166301365256 is 6525631036612.

It is a super-3 number, since 3×2166301365256³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 15366366 + ... + 15506701.

It is an arithmetic number, because the mean of its divisors is an integer number (98986774275).

Almost surely, 2^{2166301365256} is an apocalyptic number.

It is an amenable number.

2166301365256 is an abundant number, since it is smaller than the sum of its proper divisors (2585063799944).

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

2166301365256 is a wasteful number, since it uses less digits than its factorization.

2166301365256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30873266 (or 30873255 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 46.

The spelling of 2166301365256 in words is "two trillion, one hundred sixty-six billion, three hundred one million, three hundred sixty-five thousand, two hundred fifty-six".