42768512687 has 2 divisors, whose sum is σ = 42768512688. Its totient is φ = 42768512686.

The previous prime is 42768512659. The next prime is 42768512777. The reversal of 42768512687 is 78621586724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42768512687 - 2¹⁶ = 42768447151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42768512287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21384256343 + 21384256344.

It is an arithmetic number, because the mean of its divisors is an integer number (21384256344).

Almost surely, 2^42768512687 is an apocalyptic number.

42768512687 is a deficient number, since it is larger than the sum of its proper divisors (1).

42768512687 is an equidigital number, since it uses as much as digits as its factorization.

42768512687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9031680, while the sum is 56.

The spelling of 42768512687 in words is "forty-two billion, seven hundred sixty-eight million, five hundred twelve thousand, six hundred eighty-seven".