813829268785 has 8 divisors (see below), whose sum is σ = 1051717824360. Its totient is φ = 600981613824.

The previous prime is 813829268753. The next prime is 813829268849. The reversal of 813829268785 is 587862928318.

It can be written as a sum of positive squares in 4 ways, for example, as 62639577841 + 751189690944 = 250279^2 + 866712^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 813829268785 - 2⁵ = 813829268753 is a prime.

It is a super-2 number, since 2×813829268785² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 813829268785.

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, 6260225080 + ... + 6260225209.

It is an arithmetic number, because the mean of its divisors is an integer number (131464728045).

Almost surely, 2^813829268785 is an apocalyptic number.

It is an amenable number.

813829268785 is a deficient number, since it is larger than the sum of its proper divisors (237888555575).

813829268785 is a wasteful number, since it uses less digits than its factorization.

813829268785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12520450307.

The product of its digits is 92897280, while the sum is 67.

The spelling of 813829268785 in words is "eight hundred thirteen billion, eight hundred twenty-nine million, two hundred sixty-eight thousand, seven hundred eighty-five".