68446517792 has 12 divisors (see below), whose sum is σ = 134754081966. Its totient is φ = 34223258880.

The previous prime is 68446517761. The next prime is 68446517827. The reversal of 68446517792 is 29771564486.

It can be written as a sum of positive squares in only one way, i.e., 41275610896 + 27170906896 = 203164^2 + 164836^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1069476809 + ... + 1069476872.

Almost surely, 2^68446517792 is an apocalyptic number.

It is an amenable number.

68446517792 is a deficient number, since it is larger than the sum of its proper divisors (66307564174).

68446517792 is a wasteful number, since it uses less digits than its factorization.

68446517792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138953691 (or 2138953683 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 59.

The spelling of 68446517792 in words is "sixty-eight billion, four hundred forty-six million, five hundred seventeen thousand, seven hundred ninety-two".