640594126 has 16 divisors (see below), whose sum is σ = 975359664. Its totient is φ = 315486144.

The previous prime is 640594121. The next prime is 640594151. The reversal of 640594126 is 621495046.

640594126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640594121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125541 + ... + 130543.

It is an arithmetic number, because the mean of its divisors is an integer number (60959979).

Almost surely, 2^640594126 is an apocalyptic number.

640594126 is a deficient number, since it is larger than the sum of its proper divisors (334765538).

640594126 is a wasteful number, since it uses less digits than its factorization.

640594126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5955.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 640594126 is about 25309.9610035259. The cubic root of 640594126 is about 862.0404613842.

The spelling of 640594126 in words is "six hundred forty million, five hundred ninety-four thousand, one hundred twenty-six".