2645163886 has 16 divisors (see below), whose sum is σ = 4044597840. Its totient is φ = 1297137600.

The previous prime is 2645163853. The next prime is 2645163947. The reversal of 2645163886 is 6883615462.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12415 + ... + 73786.

It is an arithmetic number, because the mean of its divisors is an integer number (252787365).

Almost surely, 2^2645163886 is an apocalyptic number.

2645163886 is a deficient number, since it is larger than the sum of its proper divisors (1399433954).

2645163886 is a wasteful number, since it uses less digits than its factorization.

2645163886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86499.

The product of its digits is 1658880, while the sum is 49.

The square root of 2645163886 is about 51431.1567631917. The cubic root of 2645163886 is about 1382.9851863161.

The spelling of 2645163886 in words is "two billion, six hundred forty-five million, one hundred sixty-three thousand, eight hundred eighty-six".