813061682665 has 16 divisors (see below), whose sum is σ = 1022179438080. Its totient is φ = 620072069760.

The previous prime is 813061682633. The next prime is 813061682707. The reversal of 813061682665 is 566286160318.

It is not a de Polignac number, because 813061682665 - 2⁵ = 813061682633 is a prime.

It is a super-2 number, since 2×813061682665² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39135580 + ... + 39156349.

It is an arithmetic number, because the mean of its divisors is an integer number (63886214880).

Almost surely, 2^813061682665 is an apocalyptic number.

It is an amenable number.

813061682665 is a deficient number, since it is larger than the sum of its proper divisors (209117755415).

813061682665 is a wasteful number, since it uses less digits than its factorization.

813061682665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78292032.

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 813061682665 in words is "eight hundred thirteen billion, sixty-one million, six hundred eighty-two thousand, six hundred sixty-five".