68405061019 has 2 divisors, whose sum is σ = 68405061020. Its totient is φ = 68405061018.

The previous prime is 68405060993. The next prime is 68405061029. The reversal of 68405061019 is 91016050486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68405061019 - 2⁷ = 68405060891 is a prime.

It is a super-2 number, since 2×68405061019² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68405061029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34202530509 + 34202530510.

It is an arithmetic number, because the mean of its divisors is an integer number (34202530510).

Almost surely, 2^68405061019 is an apocalyptic number.

68405061019 is a deficient number, since it is larger than the sum of its proper divisors (1).

68405061019 is an equidigital number, since it uses as much as digits as its factorization.

68405061019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 68405061019 in words is "sixty-eight billion, four hundred five million, sixty-one thousand, nineteen".