68337783109 has 2 divisors, whose sum is σ = 68337783110. Its totient is φ = 68337783108.

The previous prime is 68337782993. The next prime is 68337783139. The reversal of 68337783109 is 90138773386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39719294209 + 28618488900 = 199297^2 + 169170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68337783109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68337783109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68337783139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34168891554 + 34168891555.

It is an arithmetic number, because the mean of its divisors is an integer number (34168891555).

Almost surely, 2^68337783109 is an apocalyptic number.

It is an amenable number.

68337783109 is a deficient number, since it is larger than the sum of its proper divisors (1).

68337783109 is an equidigital number, since it uses as much as digits as its factorization.

68337783109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 68337783109 in words is "sixty-eight billion, three hundred thirty-seven million, seven hundred eighty-three thousand, one hundred nine".