813287256612 has 12 divisors (see below), whose sum is σ = 1897670265456. Its totient is φ = 271095752200.

The previous prime is 813287256571. The next prime is 813287256629. The reversal of 813287256612 is 216652782318.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×813287256612² (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 3 ways as a sum of consecutive naturals, for example, 33886969014 + ... + 33886969037.

It is an arithmetic number, because the mean of its divisors is an integer number (158139188788).

Almost surely, 2^813287256612 is an apocalyptic number.

It is an amenable number.

813287256612 is an abundant number, since it is smaller than the sum of its proper divisors (1084383008844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813287256612 is a wasteful number, since it uses less digits than its factorization.

813287256612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67773938058 (or 67773938056 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The spelling of 813287256612 in words is "eight hundred thirteen billion, two hundred eighty-seven million, two hundred fifty-six thousand, six hundred twelve".