68904226984513 has 2 divisors, whose sum is σ = 68904226984514. Its totient is φ = 68904226984512.

The previous prime is 68904226984471. The next prime is 68904226984553. The reversal of 68904226984513 is 31548962240986.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58286613277489 + 10617613707024 = 7634567^2 + 3258468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68904226984513 is a prime.

It is not a weakly prime, because it can be changed into another prime (68904226984553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34452113492256 + 34452113492257.

It is an arithmetic number, because the mean of its divisors is an integer number (34452113492257).

Almost surely, 2^{68904226984513} is an apocalyptic number.

It is an amenable number.

68904226984513 is a deficient number, since it is larger than the sum of its proper divisors (1).

68904226984513 is an equidigital number, since it uses as much as digits as its factorization.

68904226984513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 179159040, while the sum is 67.

The spelling of 68904226984513 in words is "sixty-eight trillion, nine hundred four billion, two hundred twenty-six million, nine hundred eighty-four thousand, five hundred thirteen".