640823485705003 has 2 divisors, whose sum is σ = 640823485705004. Its totient is φ = 640823485705002.

The previous prime is 640823485704979. The next prime is 640823485705027. The reversal of 640823485705003 is 300507584328046.

640823485705003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (640823485704979) and next prime (640823485705027).

It is a cyclic number.

It is not a de Polignac number, because 640823485705003 - 2²⁵ = 640823452150571 is a prime.

It is a super-2 number, since 2×640823485705003² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (640823485705043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320411742852501 + 320411742852502.

It is an arithmetic number, because the mean of its divisors is an integer number (320411742852502).

Almost surely, 2^{640823485705003} is an apocalyptic number.

640823485705003 is a deficient number, since it is larger than the sum of its proper divisors (1).

640823485705003 is an equidigital number, since it uses as much as digits as its factorization.

640823485705003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19353600, while the sum is 55.

The spelling of 640823485705003 in words is "six hundred forty trillion, eight hundred twenty-three billion, four hundred eighty-five million, seven hundred five thousand, three".