814585011665 has 4 divisors (see below), whose sum is σ = 977502014004. Its totient is φ = 651668009328.

The previous prime is 814585011623. The next prime is 814585011677. The reversal of 814585011665 is 566110585418.

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 364971848641 + 449613163024 = 604129^2 + 670532^2 .

It is a cyclic number.

It is not a de Polignac number, because 814585011665 - 2⁶ = 814585011601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81458501162 + ... + 81458501171.

It is an arithmetic number, because the mean of its divisors is an integer number (244375503501).

Almost surely, 2^814585011665 is an apocalyptic number.

It is an amenable number.

814585011665 is a deficient number, since it is larger than the sum of its proper divisors (162917002339).

814585011665 is a wasteful number, since it uses less digits than its factorization.

814585011665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162917002338.

The product of its (nonzero) digits is 1152000, while the sum is 50.

The spelling of 814585011665 in words is "eight hundred fourteen billion, five hundred eighty-five million, eleven thousand, six hundred sixty-five".