812508705807 has 16 divisors (see below), whose sum is σ = 1085033720160. Its totient is φ = 540828288000.

The previous prime is 812508705773. The next prime is 812508705817. The reversal of 812508705807 is 708507805218.

It is not a de Polignac number, because 812508705807 - 2²² = 812504511503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 812508705807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812508705817) 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, 19412919 + ... + 19454727.

It is an arithmetic number, because the mean of its divisors is an integer number (67814607510).

Almost surely, 2^812508705807 is an apocalyptic number.

812508705807 is a deficient number, since it is larger than the sum of its proper divisors (272525014353).

812508705807 is a wasteful number, since it uses less digits than its factorization.

812508705807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51754.

The product of its (nonzero) digits is 1254400, while the sum is 51.

The spelling of 812508705807 in words is "eight hundred twelve billion, five hundred eight million, seven hundred five thousand, eight hundred seven".