5205611806 has 16 divisors (see below), whose sum is σ = 8012378880. Its totient is φ = 2535344280.

The previous prime is 5205611779. The next prime is 5205611813. The reversal of 5205611806 is 6081165025.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111396 + ... + 151063.

It is an arithmetic number, because the mean of its divisors is an integer number (500773680).

Almost surely, 2^5205611806 is an apocalyptic number.

5205611806 is a deficient number, since it is larger than the sum of its proper divisors (2806767074).

5205611806 is a wasteful number, since it uses less digits than its factorization.

5205611806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262719.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 5205611806 is about 72149.9258904678. The cubic root of 5205611806 is about 1733.1012130079.

The spelling of 5205611806 in words is "five billion, two hundred five million, six hundred eleven thousand, eight hundred six".