811081312 has 24 divisors (see below), whose sum is σ = 1616060376. Its totient is φ = 400653312.

The previous prime is 811081307. The next prime is 811081333. The reversal of 811081312 is 213180118.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150033 + ... + 155344.

It is an arithmetic number, because the mean of its divisors is an integer number (67335849).

Almost surely, 2^811081312 is an apocalyptic number.

It is an amenable number.

811081312 is a deficient number, since it is larger than the sum of its proper divisors (804979064).

811081312 is a wasteful number, since it uses less digits than its factorization.

811081312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305470 (or 305462 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 811081312 is about 28479.4893212642. The cubic root of 811081312 is about 932.5843683054.

The spelling of 811081312 in words is "eight hundred eleven million, eighty-one thousand, three hundred twelve".