640595183 has 2 divisors, whose sum is σ = 640595184. Its totient is φ = 640595182.

The previous prime is 640595167. The next prime is 640595233. The reversal of 640595183 is 381595046.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 640595183 - 2⁴ = 640595167 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 640595183.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640591183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320297591 + 320297592.

It is an arithmetic number, because the mean of its divisors is an integer number (320297592).

Almost surely, 2^640595183 is an apocalyptic number.

640595183 is a deficient number, since it is larger than the sum of its proper divisors (1).

640595183 is an equidigital number, since it uses as much as digits as its factorization.

640595183 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 640595183 is about 25309.9818846241. The cubic root of 640595183 is about 862.0409355150.

The spelling of 640595183 in words is "six hundred forty million, five hundred ninety-five thousand, one hundred eighty-three".