2165881863755 has 32 divisors (see below), whose sum is σ = 2871872299008. Its totient is φ = 1559726784000.

The previous prime is 2165881863751. The next prime is 2165881863791. The reversal of 2165881863755 is 5573681885612.

It is not a de Polignac number, because 2165881863755 - 2² = 2165881863751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2165881863691 and 2165881863700.

It is not an unprimeable number, because it can be changed into a prime (2165881863751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22534250 + ... + 22630160.

It is an arithmetic number, because the mean of its divisors is an integer number (89746009344).

Almost surely, 2^{2165881863755} is an apocalyptic number.

2165881863755 is a deficient number, since it is larger than the sum of its proper divisors (705990435253).

2165881863755 is a wasteful number, since it uses less digits than its factorization.

2165881863755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107507.

The product of its digits is 96768000, while the sum is 65.

The spelling of 2165881863755 in words is "two trillion, one hundred sixty-five billion, eight hundred eighty-one million, eight hundred sixty-three thousand, seven hundred fifty-five".