2166125944354 has 16 divisors (see below), whose sum is σ = 3337228116216. Its totient is φ = 1053720489600.

The previous prime is 2166125944337. The next prime is 2166125944357. The reversal of 2166125944354 is 4534495216612.

It can be written as a sum of positive squares in 4 ways, for example, as 2153770510329 + 12355434025 = 1467573^2 + 111155^2 .

It is not an unprimeable number, because it can be changed into a prime (2166125944357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142734 + ... + 2086294.

Almost surely, 2^{2166125944354} is an apocalyptic number.

2166125944354 is a deficient number, since it is larger than the sum of its proper divisors (1171102171862).

2166125944354 is a wasteful number, since it uses less digits than its factorization.

2166125944354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1958661.

The product of its digits is 6220800, while the sum is 52.

The spelling of 2166125944354 in words is "two trillion, one hundred sixty-six billion, one hundred twenty-five million, nine hundred forty-four thousand, three hundred fifty-four".