68539748645 has 16 divisors (see below), whose sum is σ = 84700512000. Its totient is φ = 53220118848.

The previous prime is 68539748621. The next prime is 68539748671. The reversal of 68539748645 is 54684793586.

It is a cyclic number.

It is not a de Polignac number, because 68539748645 - 2¹² = 68539744549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1447190 + ... + 1493799.

It is an arithmetic number, because the mean of its divisors is an integer number (5293782000).

Almost surely, 2^68539748645 is an apocalyptic number.

It is an amenable number.

68539748645 is a deficient number, since it is larger than the sum of its proper divisors (16160763355).

68539748645 is a wasteful number, since it uses less digits than its factorization.

68539748645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2941132.

The product of its digits is 174182400, while the sum is 65.

The spelling of 68539748645 in words is "sixty-eight billion, five hundred thirty-nine million, seven hundred forty-eight thousand, six hundred forty-five".