640253006 has 8 divisors (see below), whose sum is σ = 971170560. Its totient is φ = 316529488.

The previous prime is 640252999. The next prime is 640253017. The reversal of 640253006 is 600352046.

640253006 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1798286 + ... + 1798641.

It is an arithmetic number, because the mean of its divisors is an integer number (121396320).

Almost surely, 2^640253006 is an apocalyptic number.

640253006 is a deficient number, since it is larger than the sum of its proper divisors (330917554).

640253006 is a wasteful number, since it uses less digits than its factorization.

640253006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3597018.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 640253006 is about 25303.2212573814. The cubic root of 640253006 is about 861.8874204067.

The spelling of 640253006 in words is "six hundred forty million, two hundred fifty-three thousand, six".