854813835665 has 4 divisors (see below), whose sum is σ = 1025776602804. Its totient is φ = 683851068528.

The previous prime is 854813835653. The next prime is 854813835677. The reversal of 854813835665 is 566538318458.

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

It is an interprime number because it is at equal distance from previous prime (854813835653) and next prime (854813835677).

It can be written as a sum of positive squares in 2 ways, for example, as 645115782481 + 209698053184 = 803191^2 + 457928^2 .

It is a cyclic number.

It is not a de Polignac number, because 854813835665 - 2⁸ = 854813835409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 854813835598 and 854813835607.

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, 85481383562 + ... + 85481383571.

It is an arithmetic number, because the mean of its divisors is an integer number (256444150701).

Almost surely, 2^854813835665 is an apocalyptic number.

It is an amenable number.

854813835665 is a deficient number, since it is larger than the sum of its proper divisors (170962767139).

854813835665 is a wasteful number, since it uses less digits than its factorization.

854813835665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170962767138.

The product of its digits is 82944000, while the sum is 62.

The spelling of 854813835665 in words is "eight hundred fifty-four billion, eight hundred thirteen million, eight hundred thirty-five thousand, six hundred sixty-five".