2165109163903 has 16 divisors (see below), whose sum is σ = 2534873979456. Its totient is φ = 1810464226560.

The previous prime is 2165109163901. The next prime is 2165109163909. The reversal of 2165109163903 is 3093619015612.

It is a cyclic number.

It is not a de Polignac number, because 2165109163903 - 2¹ = 2165109163901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165109163901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6852025 + ... + 7161037.

It is an arithmetic number, because the mean of its divisors is an integer number (158429623716).

Almost surely, 2^{2165109163903} is an apocalyptic number.

2165109163903 is a deficient number, since it is larger than the sum of its proper divisors (369764815553).

2165109163903 is a wasteful number, since it uses less digits than its factorization.

2165109163903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333474.

The product of its (nonzero) digits is 262440, while the sum is 46.

The spelling of 2165109163903 in words is "two trillion, one hundred sixty-five billion, one hundred nine million, one hundred sixty-three thousand, nine hundred three".