68653092421 has 2 divisors, whose sum is σ = 68653092422. Its totient is φ = 68653092420.

The previous prime is 68653092413. The next prime is 68653092427. The reversal of 68653092421 is 12429035686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48393840196 + 20259252225 = 219986^2 + 142335^2 .

It is a cyclic number.

It is not a de Polignac number, because 68653092421 - 2³ = 68653092413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68653092427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34326546210 + 34326546211.

It is an arithmetic number, because the mean of its divisors is an integer number (34326546211).

Almost surely, 2^68653092421 is an apocalyptic number.

It is an amenable number.

68653092421 is a deficient number, since it is larger than the sum of its proper divisors (1).

68653092421 is an equidigital number, since it uses as much as digits as its factorization.

68653092421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 68653092421 in words is "sixty-eight billion, six hundred fifty-three million, ninety-two thousand, four hundred twenty-one".