68211158761 has 2 divisors, whose sum is σ = 68211158762. Its totient is φ = 68211158760.

The previous prime is 68211158693. The next prime is 68211158777. The reversal of 68211158761 is 16785111286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68068810000 + 142348761 = 260900^2 + 11931^2 .

It is a cyclic number.

It is not a de Polignac number, because 68211158761 - 2¹³ = 68211150569 is a prime.

It is not a weakly prime, because it can be changed into another prime (68211158861) 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, 34105579380 + 34105579381.

It is an arithmetic number, because the mean of its divisors is an integer number (34105579381).

Almost surely, 2^68211158761 is an apocalyptic number.

It is an amenable number.

68211158761 is a deficient number, since it is larger than the sum of its proper divisors (1).

68211158761 is an equidigital number, since it uses as much as digits as its factorization.

68211158761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 46.

The spelling of 68211158761 in words is "sixty-eight billion, two hundred eleven million, one hundred fifty-eight thousand, seven hundred sixty-one".