68653022261 has 2 divisors, whose sum is σ = 68653022262. Its totient is φ = 68653022260.

The previous prime is 68653022233. The next prime is 68653022351. The reversal of 68653022261 is 16222035686.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46632243025 + 22020779236 = 215945^2 + 148394^2 .

It is a cyclic number.

It is not a de Polignac number, because 68653022261 - 2¹⁰ = 68653021237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68653022231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34326511130 + 34326511131.

It is an arithmetic number, because the mean of its divisors is an integer number (34326511131).

Almost surely, 2^68653022261 is an apocalyptic number.

It is an amenable number.

68653022261 is a deficient number, since it is larger than the sum of its proper divisors (1).

68653022261 is an equidigital number, since it uses as much as digits as its factorization.

68653022261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 68653022261 in words is "sixty-eight billion, six hundred fifty-three million, twenty-two thousand, two hundred sixty-one".