812194288264 has 64 divisors (see below), whose sum is σ = 1540970121600. Its totient is φ = 401300573184.

The previous prime is 812194288261. The next prime is 812194288331. The reversal of 812194288264 is 462882491218.

It is not an unprimeable number, because it can be changed into a prime (812194288261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278433334 + ... + 278436250.

It is an arithmetic number, because the mean of its divisors is an integer number (24077658150).

Almost surely, 2^812194288264 is an apocalyptic number.

It is an amenable number.

812194288264 is a deficient number, since it is larger than the sum of its proper divisors (728775833336).

812194288264 is a wasteful number, since it uses less digits than its factorization.

812194288264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142 (or 4138 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 55.

The spelling of 812194288264 in words is "eight hundred twelve billion, one hundred ninety-four million, two hundred eighty-eight thousand, two hundred sixty-four".