816057324205 has 4 divisors (see below), whose sum is σ = 979268789052. Its totient is φ = 652845859360.

The previous prime is 816057324191. The next prime is 816057324211. The reversal of 816057324205 is 502423750618.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 428273389476 + 387783934729 = 654426^2 + 622723^2 .

It is not a de Polignac number, because 816057324205 - 2¹⁵ = 816057291437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81605732416 + ... + 81605732425.

It is an arithmetic number, because the mean of its divisors is an integer number (244817197263).

Almost surely, 2^816057324205 is an apocalyptic number.

It is an amenable number.

816057324205 is a deficient number, since it is larger than the sum of its proper divisors (163211464847).

816057324205 is a wasteful number, since it uses less digits than its factorization.

816057324205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163211464846.

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 816057324205 in words is "eight hundred sixteen billion, fifty-seven million, three hundred twenty-four thousand, two hundred five".