2166251454216 has 48 divisors (see below), whose sum is σ = 5883551292060. Its totient is φ = 720038246400.

The previous prime is 2166251454187. The next prime is 2166251454223. The reversal of 2166251454216 is 6124541526612.

2166251454216 is a `hidden beast` number, since 2 + 1 + 6 + 62 + 514 + 54 + 21 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1914498391716 + 251753062500 = 1383654^2 + 501750^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42590485 + ... + 42641316.

Almost surely, 2^{2166251454216} is an apocalyptic number.

It is an amenable number.

2166251454216 is an abundant number, since it is smaller than the sum of its proper divisors (3717299837844).

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

2166251454216 is a wasteful number, since it uses less digits than its factorization.

2166251454216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85232166 (or 85232159 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The spelling of 2166251454216 in words is "two trillion, one hundred sixty-six billion, two hundred fifty-one million, four hundred fifty-four thousand, two hundred sixteen".