68147863693 has 12 divisors (see below), whose sum is σ = 84335143008. Its totient is φ = 53919187920.

The previous prime is 68147863691. The next prime is 68147863727. The reversal of 68147863693 is 39636874186.

It is not a de Polignac number, because 68147863693 - 2¹ = 68147863691 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 (68147863691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28801803 + ... + 28804168.

It is an arithmetic number, because the mean of its divisors is an integer number (7027928584).

Almost surely, 2^68147863693 is an apocalyptic number.

It is an amenable number.

68147863693 is a deficient number, since it is larger than the sum of its proper divisors (16187279315).

68147863693 is a wasteful number, since it uses less digits than its factorization.

68147863693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57606004 (or 57605991 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 61.

The spelling of 68147863693 in words is "sixty-eight billion, one hundred forty-seven million, eight hundred sixty-three thousand, six hundred ninety-three".