2165445566522 has 32 divisors (see below), whose sum is σ = 3791721922560. Its totient is φ = 908171414640.

The previous prime is 2165445566461. The next prime is 2165445566623. The reversal of 2165445566522 is 2256655445612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4397897 + ... + 4865427.

It is an arithmetic number, because the mean of its divisors is an integer number (118491310080).

Almost surely, 2^{2165445566522} is an apocalyptic number.

2165445566522 is a deficient number, since it is larger than the sum of its proper divisors (1626276356038).

2165445566522 is a wasteful number, since it uses less digits than its factorization.

2165445566522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474626.

The product of its digits is 17280000, while the sum is 53.

The spelling of 2165445566522 in words is "two trillion, one hundred sixty-five billion, four hundred forty-five million, five hundred sixty-six thousand, five hundred twenty-two".