68451993679 has 2 divisors, whose sum is σ = 68451993680. Its totient is φ = 68451993678.

The previous prime is 68451993641. The next prime is 68451993737. The reversal of 68451993679 is 97639915486.

68451993679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68451993679 - 2¹³ = 68451985487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68451993979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34225996839 + 34225996840.

It is an arithmetic number, because the mean of its divisors is an integer number (34225996840).

Almost surely, 2^68451993679 is an apocalyptic number.

68451993679 is a deficient number, since it is larger than the sum of its proper divisors (1).

68451993679 is an equidigital number, since it uses as much as digits as its factorization.

68451993679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 88179840, while the sum is 67.

The spelling of 68451993679 in words is "sixty-eight billion, four hundred fifty-one million, nine hundred ninety-three thousand, six hundred seventy-nine".