812288763791 has 4 divisors (see below), whose sum is σ = 816138473784. Its totient is φ = 808439053800.

The previous prime is 812288763763. The next prime is 812288763809. The reversal of 812288763791 is 197367882218.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 812288763791 - 2²⁶ = 812221654927 is a prime.

It is a super-2 number, since 2×812288763791² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812288763721) 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, 1924854680 + ... + 1924855101.

It is an arithmetic number, because the mean of its divisors is an integer number (204034618446).

Almost surely, 2^812288763791 is an apocalyptic number.

812288763791 is a deficient number, since it is larger than the sum of its proper divisors (3849709993).

812288763791 is a wasteful number, since it uses less digits than its factorization.

812288763791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3849709992.

The product of its digits is 16257024, while the sum is 62.

The spelling of 812288763791 in words is "eight hundred twelve billion, two hundred eighty-eight million, seven hundred sixty-three thousand, seven hundred ninety-one".