68013377647 has 2 divisors, whose sum is σ = 68013377648. Its totient is φ = 68013377646.

The previous prime is 68013377611. The next prime is 68013377741. The reversal of 68013377647 is 74677331086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68013377647 - 2¹⁵ = 68013344879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68013377594 and 68013377603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68013378647) by changing a digit.

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, 34006688823 + 34006688824.

It is an arithmetic number, because the mean of its divisors is an integer number (34006688824).

Almost surely, 2^68013377647 is an apocalyptic number.

68013377647 is a deficient number, since it is larger than the sum of its proper divisors (1).

68013377647 is an equidigital number, since it uses as much as digits as its factorization.

68013377647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3556224, while the sum is 52.

The spelling of 68013377647 in words is "sixty-eight billion, thirteen million, three hundred seventy-seven thousand, six hundred forty-seven".