68733904672 has 24 divisors (see below), whose sum is σ = 135368778636. Its totient is φ = 34354532352.

The previous prime is 68733904669. The next prime is 68733904691. The reversal of 68733904672 is 27640933786.

It can be written as a sum of positive squares in 2 ways, for example, as 63304572816 + 5429331856 = 251604^2 + 73684^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297873 + ... + 475600.

Almost surely, 2^68733904672 is an apocalyptic number.

It is an amenable number.

68733904672 is a deficient number, since it is larger than the sum of its proper divisors (66634873964).

68733904672 is a wasteful number, since it uses less digits than its factorization.

68733904672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776260 (or 776252 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 55.

The spelling of 68733904672 in words is "sixty-eight billion, seven hundred thirty-three million, nine hundred four thousand, six hundred seventy-two".