640202689559 has 2 divisors, whose sum is σ = 640202689560. Its totient is φ = 640202689558.

The previous prime is 640202689547. The next prime is 640202689741. The reversal of 640202689559 is 955986202046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 640202689559 - 2⁸ = 640202689303 is a prime.

It is a super-2 number, since 2×640202689559² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640202689759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320101344779 + 320101344780.

It is an arithmetic number, because the mean of its divisors is an integer number (320101344780).

Almost surely, 2^640202689559 is an apocalyptic number.

640202689559 is a deficient number, since it is larger than the sum of its proper divisors (1).

640202689559 is an equidigital number, since it uses as much as digits as its factorization.

640202689559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9331200, while the sum is 56.

The spelling of 640202689559 in words is "six hundred forty billion, two hundred two million, six hundred eighty-nine thousand, five hundred fifty-nine".