85663643318 has 32 divisors (see below), whose sum is σ = 142139286432. Its totient is φ = 38393222400.

The previous prime is 85663643309. The next prime is 85663643327. The reversal of 85663643318 is 81334636658.

It is an interprime number because it is at equal distance from previous prime (85663643309) and next prime (85663643327).

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 85663643318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7801280 + ... + 7812252.

It is an arithmetic number, because the mean of its divisors is an integer number (4441852701).

Almost surely, 2^85663643318 is an apocalyptic number.

85663643318 is a deficient number, since it is larger than the sum of its proper divisors (56475643114).

85663643318 is a wasteful number, since it uses less digits than its factorization.

85663643318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15920.

The product of its digits is 7464960, while the sum is 53.

The spelling of 85663643318 in words is "eighty-five billion, six hundred sixty-three million, six hundred forty-three thousand, three hundred eighteen".