68431025813 has 2 divisors, whose sum is σ = 68431025814. Its totient is φ = 68431025812.

The previous prime is 68431025801. The next prime is 68431025869. The reversal of 68431025813 is 31852013486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68430897649 + 128164 = 261593^2 + 358^2 .

It is a cyclic number.

It is not a de Polignac number, because 68431025813 - 2⁴ = 68431025797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68431025413) 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, 34215512906 + 34215512907.

It is an arithmetic number, because the mean of its divisors is an integer number (34215512907).

Almost surely, 2^68431025813 is an apocalyptic number.

It is an amenable number.

68431025813 is a deficient number, since it is larger than the sum of its proper divisors (1).

68431025813 is an equidigital number, since it uses as much as digits as its factorization.

68431025813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 41.

The spelling of 68431025813 in words is "sixty-eight billion, four hundred thirty-one million, twenty-five thousand, eight hundred thirteen".