85663142813 has 4 divisors (see below), whose sum is σ = 85666166940. Its totient is φ = 85660118688.

The previous prime is 85663142801. The next prime is 85663142819. The reversal of 85663142813 is 31824136658.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31824136658 = 2 ⋅15912068329.

It can be written as a sum of positive squares in 2 ways, for example, as 41786718724 + 43876424089 = 204418^2 + 209467^2 .

It is a cyclic number.

It is not a de Polignac number, because 85663142813 - 2¹⁶ = 85663077277 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 (85663142819) 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, 1469168 + ... + 1526361.

It is an arithmetic number, because the mean of its divisors is an integer number (21416541735).

Almost surely, 2^85663142813 is an apocalyptic number.

It is an amenable number.

85663142813 is a deficient number, since it is larger than the sum of its proper divisors (3024127).

85663142813 is a wasteful number, since it uses less digits than its factorization.

85663142813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3024126.

The product of its digits is 829440, while the sum is 47.

The spelling of 85663142813 in words is "eighty-five billion, six hundred sixty-three million, one hundred forty-two thousand, eight hundred thirteen".