68045786989 has 2 divisors, whose sum is σ = 68045786990. Its totient is φ = 68045786988.

The previous prime is 68045786983. The next prime is 68045787071. The reversal of 68045786989 is 98968754086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55927520100 + 12118266889 = 236490^2 + 110083^2 .

It is a cyclic number.

It is not a de Polignac number, because 68045786989 - 2¹⁵ = 68045754221 is a prime.

It is a super-3 number, since 3×68045786989³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68045786983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34022893494 + 34022893495.

It is an arithmetic number, because the mean of its divisors is an integer number (34022893495).

Almost surely, 2^68045786989 is an apocalyptic number.

It is an amenable number.

68045786989 is a deficient number, since it is larger than the sum of its proper divisors (1).

68045786989 is an equidigital number, since it uses as much as digits as its factorization.

68045786989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209018880, while the sum is 70.

The spelling of 68045786989 in words is "sixty-eight billion, forty-five million, seven hundred eighty-six thousand, nine hundred eighty-nine".