812543267879 has 6 divisors (see below), whose sum is σ = 945203393304. Its totient is φ = 696465658140.

The previous prime is 812543267863. The next prime is 812543267903. The reversal of 812543267879 is 978762345218.

It is not a de Polignac number, because 812543267879 - 2⁴ = 812543267863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (812543267819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8291257787 + ... + 8291257884.

It is an arithmetic number, because the mean of its divisors is an integer number (157533898884).

Almost surely, 2^812543267879 is an apocalyptic number.

812543267879 is a deficient number, since it is larger than the sum of its proper divisors (132660125425).

812543267879 is a wasteful number, since it uses less digits than its factorization.

812543267879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16582515685 (or 16582515678 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 62.

The spelling of 812543267879 in words is "eight hundred twelve billion, five hundred forty-three million, two hundred sixty-seven thousand, eight hundred seventy-nine".