71805205106 has 16 divisors (see below), whose sum is σ = 110344458168. Its totient is φ = 35023872000.

The previous prime is 71805205091. The next prime is 71805205117. The reversal of 71805205106 is 60150250817.

It can be written as a sum of positive squares in 4 ways, for example, as 50180032081 + 21625173025 = 224009^2 + 147055^2 .

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, 1119506 + ... + 1181906.

Almost surely, 2^71805205106 is an apocalyptic number.

71805205106 is a deficient number, since it is larger than the sum of its proper divisors (38539253062).

71805205106 is a wasteful number, since it uses less digits than its factorization.

71805205106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76477.

The product of its (nonzero) digits is 16800, while the sum is 35.

The spelling of 71805205106 in words is "seventy-one billion, eight hundred five million, two hundred five thousand, one hundred six".