68395580047 has 2 divisors, whose sum is σ = 68395580048. Its totient is φ = 68395580046.

The previous prime is 68395579999. The next prime is 68395580053. The reversal of 68395580047 is 74008559386.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68395580047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68395580047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68395580947) 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, 34197790023 + 34197790024.

It is an arithmetic number, because the mean of its divisors is an integer number (34197790024).

Almost surely, 2^68395580047 is an apocalyptic number.

68395580047 is a deficient number, since it is larger than the sum of its proper divisors (1).

68395580047 is an equidigital number, since it uses as much as digits as its factorization.

68395580047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 68395580047 in words is "sixty-eight billion, three hundred ninety-five million, five hundred eighty thousand, forty-seven".