812210811392 has 30 divisors (see below), whose sum is σ = 1622876019633. Its totient is φ = 406095209472.

The previous prime is 812210811359. The next prime is 812210811407. The reversal of 812210811392 is 293118012218.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 601654640896 + 210556170496 = 775664^2 + 458864^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=637264.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 20372534 + ... + 20412362.

Almost surely, 2^812210811392 is an apocalyptic number.

It is an amenable number.

812210811392 is a deficient number, since it is larger than the sum of its proper divisors (810665208241).

812210811392 is an frugal number, since it uses more digits than its factorization.

812210811392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79676 (or 39831 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 38.

The spelling of 812210811392 in words is "eight hundred twelve billion, two hundred ten million, eight hundred eleven thousand, three hundred ninety-two".