68949802249 has 2 divisors, whose sum is σ = 68949802250. Its totient is φ = 68949802248.

The previous prime is 68949802241. The next prime is 68949802279. The reversal of 68949802249 is 94220894986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53397966400 + 15551835849 = 231080^2 + 124707^2 .

It is a cyclic number.

It is not a de Polignac number, because 68949802249 - 2³ = 68949802241 is a prime.

It is not a weakly prime, because it can be changed into another prime (68949802241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34474901124 + 34474901125.

It is an arithmetic number, because the mean of its divisors is an integer number (34474901125).

Almost surely, 2^68949802249 is an apocalyptic number.

It is an amenable number.

68949802249 is a deficient number, since it is larger than the sum of its proper divisors (1).

68949802249 is an equidigital number, since it uses as much as digits as its factorization.

68949802249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17915904, while the sum is 61.

The spelling of 68949802249 in words is "sixty-eight billion, nine hundred forty-nine million, eight hundred two thousand, two hundred forty-nine".