816242273863 has 16 divisors (see below), whose sum is σ = 894587430240. Its totient is φ = 742054003200.

The previous prime is 816242273857. The next prime is 816242273897. The reversal of 816242273863 is 368372242618.

It is a cyclic number.

It is not a de Polignac number, because 816242273863 - 2³³ = 807652339271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 816242273863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816242273813) 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, 8541070 + ... + 8636107.

It is an arithmetic number, because the mean of its divisors is an integer number (55911714390).

Almost surely, 2^816242273863 is an apocalyptic number.

816242273863 is a deficient number, since it is larger than the sum of its proper divisors (78345156377).

816242273863 is a wasteful number, since it uses less digits than its factorization.

816242273863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17177298.

The product of its digits is 4644864, while the sum is 52.

The spelling of 816242273863 in words is "eight hundred sixteen billion, two hundred forty-two million, two hundred seventy-three thousand, eight hundred sixty-three".