31316642106663 has 16 divisors (see below), whose sum is σ = 44212158236160. Its totient is φ = 19649467479936.

The previous prime is 31316642106613. The next prime is 31316642106671. The reversal of 31316642106663 is 36660124661313.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-31316642106663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31316642106613) 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, 2439378 + ... + 8281536.

It is an arithmetic number, because the mean of its divisors is an integer number (2763259889760).

Almost surely, 2^{31316642106663} is an apocalyptic number.

31316642106663 is a deficient number, since it is larger than the sum of its proper divisors (12895516129497).

31316642106663 is a wasteful number, since it uses less digits than its factorization.

31316642106663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5947286.

The product of its (nonzero) digits is 1679616, while the sum is 48.

Adding to 31316642106663 its reverse (36660124661313), we get a palindrome (67976766767976).

The spelling of 31316642106663 in words is "thirty-one trillion, three hundred sixteen billion, six hundred forty-two million, one hundred six thousand, six hundred sixty-three".