641874715759 has 2 divisors, whose sum is σ = 641874715760. Its totient is φ = 641874715758.

The previous prime is 641874715609. The next prime is 641874715819. The reversal of 641874715759 is 957517478146.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641874715759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 641874715759.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (641874725759) 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, 320937357879 + 320937357880.

It is an arithmetic number, because the mean of its divisors is an integer number (320937357880).

Almost surely, 2^641874715759 is an apocalyptic number.

641874715759 is a deficient number, since it is larger than the sum of its proper divisors (1).

641874715759 is an equidigital number, since it uses as much as digits as its factorization.

641874715759 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 59270400, while the sum is 64.

The spelling of 641874715759 in words is "six hundred forty-one billion, eight hundred seventy-four million, seven hundred fifteen thousand, seven hundred fifty-nine".