68794574538251 has 2 divisors, whose sum is σ = 68794574538252. Its totient is φ = 68794574538250.

The previous prime is 68794574538101. The next prime is 68794574538271. The reversal of 68794574538251 is 15283547549786.

It is a happy number.

68794574538251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68794574538251 - 2²⁶ = 68794507429387 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (68794574538271) 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, 34397287269125 + 34397287269126.

It is an arithmetic number, because the mean of its divisors is an integer number (34397287269126).

Almost surely, 2^{68794574538251} is an apocalyptic number.

68794574538251 is a deficient number, since it is larger than the sum of its proper divisors (1).

68794574538251 is an equidigital number, since it uses as much as digits as its factorization.

68794574538251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128000, while the sum is 74.

The spelling of 68794574538251 in words is "sixty-eight trillion, seven hundred ninety-four billion, five hundred seventy-four million, five hundred thirty-eight thousand, two hundred fifty-one".