2163166387209 has 12 divisors (see below), whose sum is σ = 3124611274096. Its totient is φ = 1442093569272.

The previous prime is 2163166387181. The next prime is 2163166387231. The reversal of 2163166387209 is 9027836613612.

2163166387209 is a `hidden beast` number, since 21 + 6 + 31 + 6 + 6 + 387 + 209 = 666.

It is not a de Polignac number, because 2163166387209 - 2¹¹ = 2163166385161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2163166387009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 632839 + ... + 2174124.

Almost surely, 2^{2163166387209} is an apocalyptic number.

It is an amenable number.

2163166387209 is a deficient number, since it is larger than the sum of its proper divisors (961444886887).

2163166387209 is a wasteful number, since it uses less digits than its factorization.

2163166387209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2892596 (or 2892593 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 2163166387209 in words is "two trillion, one hundred sixty-three billion, one hundred sixty-six million, three hundred eighty-seven thousand, two hundred nine".