67940618719 has 2 divisors, whose sum is σ = 67940618720. Its totient is φ = 67940618718.

The previous prime is 67940618717. The next prime is 67940618791. The reversal of 67940618719 is 91781604976.

67940618719 is nontrivially palindromic in base 16.

Together with next prime (67940618791) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67940618719 - 2¹ = 67940618717 is a prime.

It is a super-2 number, since 2×67940618719² (a number of 22 digits) contains 22 as substring.

Together with 67940618717, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67940618717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33970309359 + 33970309360.

It is an arithmetic number, because the mean of its divisors is an integer number (33970309360).

Almost surely, 2^67940618719 is an apocalyptic number.

67940618719 is a deficient number, since it is larger than the sum of its proper divisors (1).

67940618719 is an equidigital number, since it uses as much as digits as its factorization.

67940618719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 67940618719 in words is "sixty-seven billion, nine hundred forty million, six hundred eighteen thousand, seven hundred nineteen".