68912164745 has 4 divisors (see below), whose sum is σ = 82694597700. Its totient is φ = 55129731792.

The previous prime is 68912164721. The next prime is 68912164753. The reversal of 68912164745 is 54746121986.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11275678969 + 57636485776 = 106187^2 + 240076^2 .

It is a cyclic number.

It is not a de Polignac number, because 68912164745 - 2²⁴ = 68895387529 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 6891216470 + ... + 6891216479.

It is an arithmetic number, because the mean of its divisors is an integer number (20673649425).

Almost surely, 2^68912164745 is an apocalyptic number.

It is an amenable number.

68912164745 is a deficient number, since it is larger than the sum of its proper divisors (13782432955).

68912164745 is a wasteful number, since it uses less digits than its factorization.

68912164745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13782432954.

The product of its digits is 2903040, while the sum is 53.

The spelling of 68912164745 in words is "sixty-eight billion, nine hundred twelve million, one hundred sixty-four thousand, seven hundred forty-five".