2166141020265 has 32 divisors (see below), whose sum is σ = 3851441721600. Its totient is φ = 1155117905280.

The previous prime is 2166141020249. The next prime is 2166141020291. The reversal of 2166141020265 is 5620201416612.

2166141020265 is a `hidden beast` number, since 2 + 1 + 6 + 614 + 10 + 2 + 0 + 26 + 5 = 666.

It is not a de Polignac number, because 2166141020265 - 2⁴ = 2166141020249 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 93901 + ... + 2083530.

It is an arithmetic number, because the mean of its divisors is an integer number (120357553800).

Almost surely, 2^{2166141020265} is an apocalyptic number.

It is an amenable number.

2166141020265 is a deficient number, since it is larger than the sum of its proper divisors (1685300701335).

2166141020265 is a wasteful number, since it uses less digits than its factorization.

2166141020265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184814 (or 2184808 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

Adding to 2166141020265 its reverse (5620201416612), we get a palindrome (7786342436877).

The spelling of 2166141020265 in words is "two trillion, one hundred sixty-six billion, one hundred forty-one million, twenty thousand, two hundred sixty-five".