2161105064 has 16 divisors (see below), whose sum is σ = 4052572020. Its totient is φ = 1080419200.

The previous prime is 2161105061. The next prime is 2161105069. The reversal of 2161105064 is 4605011612.

It can be written as a sum of positive squares in 2 ways, for example, as 2149064164 + 12040900 = 46358^2 + 3470^2 .

It is not an unprimeable number, because it can be changed into a prime (2161105061) 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, 101492 + ... + 120924.

Almost surely, 2^2161105064 is an apocalyptic number.

It is an amenable number.

2161105064 is a deficient number, since it is larger than the sum of its proper divisors (1891466956).

2161105064 is a wasteful number, since it uses less digits than its factorization.

2161105064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33340 (or 33336 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 2161105064 is about 46487.6872300613. The cubic root of 2161105064 is about 1292.8812197900.

Adding to 2161105064 its reverse (4605011612), we get a palindrome (6766116676).

The spelling of 2161105064 in words is "two billion, one hundred sixty-one million, one hundred five thousand, sixty-four".