640050003 has 48 divisors (see below), whose sum is σ = 989561664. Its totient is φ = 397774080.

The previous prime is 640049987. The next prime is 640050007. The reversal of 640050003 is 300050046.

It is a happy number.

It is not a de Polignac number, because 640050003 - 2⁴ = 640049987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640050007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2184325 + ... + 2184617.

It is an arithmetic number, because the mean of its divisors is an integer number (20615868).

Almost surely, 2^640050003 is an apocalyptic number.

640050003 is a deficient number, since it is larger than the sum of its proper divisors (349511661).

640050003 is a wasteful number, since it uses less digits than its factorization.

640050003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 640050003 is about 25299.2095331060. The cubic root of 640050003 is about 861.7963188028.

The spelling of 640050003 in words is "six hundred forty million, fifty thousand, three".