68756406529 has 2 divisors, whose sum is σ = 68756406530. Its totient is φ = 68756406528.

The previous prime is 68756406527. The next prime is 68756406533. The reversal of 68756406529 is 92560465786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36767295504 + 31989111025 = 191748^2 + 178855^2 .

It is a cyclic number.

It is not a de Polignac number, because 68756406529 - 2¹ = 68756406527 is a prime.

It is a super-2 number, since 2×68756406529² (a number of 22 digits) contains 22 as substring.

Together with 68756406527, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (68756406527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34378203264 + 34378203265.

It is an arithmetic number, because the mean of its divisors is an integer number (34378203265).

Almost surely, 2^68756406529 is an apocalyptic number.

It is an amenable number.

68756406529 is a deficient number, since it is larger than the sum of its proper divisors (1).

68756406529 is an equidigital number, since it uses as much as digits as its factorization.

68756406529 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 68756406529 in words is "sixty-eight billion, seven hundred fifty-six million, four hundred six thousand, five hundred twenty-nine".