812043866528 has 24 divisors (see below), whose sum is σ = 1605080746080. Its totient is φ = 404404312000.

The previous prime is 812043866527. The next prime is 812043866533. The reversal of 812043866528 is 825668340218.

It is a self number, because there is not a number n which added to its sum of digits gives 812043866528.

It is not an unprimeable number, because it can be changed into a prime (812043866527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50542508 + ... + 50558571.

It is an arithmetic number, because the mean of its divisors is an integer number (66878364420).

Almost surely, 2^812043866528 is an apocalyptic number.

It is an amenable number.

812043866528 is a deficient number, since it is larger than the sum of its proper divisors (793036879552).

812043866528 is a wasteful number, since it uses less digits than its factorization.

812043866528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101101340 (or 101101332 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 53.

The spelling of 812043866528 in words is "eight hundred twelve billion, forty-three million, eight hundred sixty-six thousand, five hundred twenty-eight".