2163166387191 has 24 divisors (see below), whose sum is σ = 3130559228160. Its totient is φ = 1439349964800.

The previous prime is 2163166387181. The next prime is 2163166387231. The reversal of 2163166387191 is 1917836613612.

2163166387191 is a `hidden beast` number, since 2 + 1 + 6 + 316 + 63 + 87 + 191 = 666.

It is not a de Polignac number, because 2163166387191 - 2⁵ = 2163166387159 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163166387181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16543831 + ... + 16674071.

It is an arithmetic number, because the mean of its divisors is an integer number (130439967840).

Almost surely, 2^{2163166387191} is an apocalyptic number.

2163166387191 is a deficient number, since it is larger than the sum of its proper divisors (967392840969).

2163166387191 is a wasteful number, since it uses less digits than its factorization.

2163166387191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133767 (or 133764 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 2163166387191 in words is "two trillion, one hundred sixty-three billion, one hundred sixty-six million, three hundred eighty-seven thousand, one hundred ninety-one".