68427640499 has 2 divisors, whose sum is σ = 68427640500. Its totient is φ = 68427640498.

The previous prime is 68427640427. The next prime is 68427640517. The reversal of 68427640499 is 99404672486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68427640499 - 2⁸ = 68427640243 is a prime.

It is not a weakly prime, because it can be changed into another prime (68427630499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34213820249 + 34213820250.

It is an arithmetic number, because the mean of its divisors is an integer number (34213820250).

Almost surely, 2^68427640499 is an apocalyptic number.

68427640499 is a deficient number, since it is larger than the sum of its proper divisors (1).

68427640499 is an equidigital number, since it uses as much as digits as its factorization.

68427640499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20901888, while the sum is 59.

The spelling of 68427640499 in words is "sixty-eight billion, four hundred twenty-seven million, six hundred forty thousand, four hundred ninety-nine".