812816675 has 48 divisors (see below), whose sum is σ = 1173793920. Its totient is φ = 552096000.

The previous prime is 812816671. The next prime is 812816689. The reversal of 812816675 is 576618218.

It is a happy number.

It is not a de Polignac number, because 812816675 - 2² = 812816671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (812816671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 380360 + ... + 382490.

It is an arithmetic number, because the mean of its divisors is an integer number (24454040).

Almost surely, 2^812816675 is an apocalyptic number.

812816675 is a deficient number, since it is larger than the sum of its proper divisors (360977245).

812816675 is a wasteful number, since it uses less digits than its factorization.

812816675 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2244 (or 2239 counting only the distinct ones).

The product of its digits is 161280, while the sum is 44.

The square root of 812816675 is about 28509.9399332934. The cubic root of 812816675 is about 933.2490035060.

The spelling of 812816675 in words is "eight hundred twelve million, eight hundred sixteen thousand, six hundred seventy-five".