2188165172107 has 4 divisors (see below), whose sum is σ = 2188891898856. Its totient is φ = 2187438445360.

The previous prime is 2188165172041. The next prime is 2188165172143. The reversal of 2188165172107 is 7012715618812.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2188165172107 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2188165176107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363358858 + ... + 363364879.

It is an arithmetic number, because the mean of its divisors is an integer number (547222974714).

Almost surely, 2^{2188165172107} is an apocalyptic number.

2188165172107 is a deficient number, since it is larger than the sum of its proper divisors (726726749).

2188165172107 is an equidigital number, since it uses as much as digits as its factorization.

2188165172107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726726748.

The product of its (nonzero) digits is 376320, while the sum is 49.

The spelling of 2188165172107 in words is "two trillion, one hundred eighty-eight billion, one hundred sixty-five million, one hundred seventy-two thousand, one hundred seven".