68852066733509 has 2 divisors, whose sum is σ = 68852066733510. Its totient is φ = 68852066733508.

The previous prime is 68852066733413. The next prime is 68852066733523. The reversal of 68852066733509 is 90533766025886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62573684584609 + 6278382148900 = 7910353^2 + 2505670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68852066733509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68852066733539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34426033366754 + 34426033366755.

It is an arithmetic number, because the mean of its divisors is an integer number (34426033366755).

Almost surely, 2^{68852066733509} is an apocalyptic number.

It is an amenable number.

68852066733509 is a deficient number, since it is larger than the sum of its proper divisors (1).

68852066733509 is an equidigital number, since it uses as much as digits as its factorization.

68852066733509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 391910400, while the sum is 68.

The spelling of 68852066733509 in words is "sixty-eight trillion, eight hundred fifty-two billion, sixty-six million, seven hundred thirty-three thousand, five hundred nine".