68785648564 has 24 divisors (see below), whose sum is σ = 125668204200. Its totient is φ = 32902208640.

The previous prime is 68785648553. The next prime is 68785648573. The reversal of 68785648564 is 46584658786.

It can be written as a sum of positive squares in 4 ways, for example, as 7251884964 + 61533763600 = 85158^2 + 248060^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68785648564.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2707447 + ... + 2732734.

It is an arithmetic number, because the mean of its divisors is an integer number (5236175175).

Almost surely, 2^68785648564 is an apocalyptic number.

It is an amenable number.

68785648564 is a deficient number, since it is larger than the sum of its proper divisors (56882555636).

68785648564 is a wasteful number, since it uses less digits than its factorization.

68785648564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5440323 (or 5440321 counting only the distinct ones).

The product of its digits is 309657600, while the sum is 67.

The spelling of 68785648564 in words is "sixty-eight billion, seven hundred eighty-five million, six hundred forty-eight thousand, five hundred sixty-four".