812681830105 has 8 divisors (see below), whose sum is σ = 978843544200. Its totient is φ = 647728565376.

The previous prime is 812681830063. The next prime is 812681830123. The reversal of 812681830105 is 501038186218.

It can be written as a sum of positive squares in 4 ways, for example, as 45636922384 + 767044907721 = 213628^2 + 875811^2 .

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 812681830105 - 2¹⁷ = 812681699033 is a prime.

It is a super-2 number, since 2×812681830105² (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 7 ways as a sum of consecutive naturals, for example, 302110860 + ... + 302113549.

It is an arithmetic number, because the mean of its divisors is an integer number (122355443025).

Almost surely, 2^812681830105 is an apocalyptic number.

It is an amenable number.

812681830105 is a deficient number, since it is larger than the sum of its proper divisors (166161714095).

812681830105 is a wasteful number, since it uses less digits than its factorization.

812681830105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604224683.

The product of its (nonzero) digits is 92160, while the sum is 43.

The spelling of 812681830105 in words is "eight hundred twelve billion, six hundred eighty-one million, eight hundred thirty thousand, one hundred five".