68647504847 has 4 divisors (see below), whose sum is σ = 68659100760. Its totient is φ = 68635908936.

The previous prime is 68647504837. The next prime is 68647504901. The reversal of 68647504847 is 74840574686.

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

It is a cyclic number.

It is not a de Polignac number, because 68647504847 - 2¹² = 68647500751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68647504837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5789072 + ... + 5800917.

It is an arithmetic number, because the mean of its divisors is an integer number (17164775190).

Almost surely, 2^68647504847 is an apocalyptic number.

68647504847 is a deficient number, since it is larger than the sum of its proper divisors (11595913).

68647504847 is a wasteful number, since it uses less digits than its factorization.

68647504847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11595912.

The product of its (nonzero) digits is 36126720, while the sum is 59.

The spelling of 68647504847 in words is "sixty-eight billion, six hundred forty-seven million, five hundred four thousand, eight hundred forty-seven".