68198869253 has 2 divisors, whose sum is σ = 68198869254. Its totient is φ = 68198869252.

The previous prime is 68198869243. The next prime is 68198869259. The reversal of 68198869253 is 35296889186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53361924004 + 14836945249 = 231002^2 + 121807^2 .

It is a cyclic number.

It is not a de Polignac number, because 68198869253 - 2¹² = 68198865157 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68198869253.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68198869259) 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, 34099434626 + 34099434627.

It is an arithmetic number, because the mean of its divisors is an integer number (34099434627).

Almost surely, 2^68198869253 is an apocalyptic number.

It is an amenable number.

68198869253 is a deficient number, since it is larger than the sum of its proper divisors (1).

68198869253 is an equidigital number, since it uses as much as digits as its factorization.

68198869253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 44789760, while the sum is 65.

The spelling of 68198869253 in words is "sixty-eight billion, one hundred ninety-eight million, eight hundred sixty-nine thousand, two hundred fifty-three".