640580383 has 32 divisors (see below), whose sum is σ = 750988800. Its totient is φ = 542982528.

The previous prime is 640580377. The next prime is 640580387. The reversal of 640580383 is 383085046.

It is not a de Polignac number, because 640580383 - 2⁹ = 640579871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640580387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3929860 + ... + 3930022.

It is an arithmetic number, because the mean of its divisors is an integer number (23468400).

Almost surely, 2^640580383 is an apocalyptic number.

640580383 is a deficient number, since it is larger than the sum of its proper divisors (110408417).

640580383 is a wasteful number, since it uses less digits than its factorization.

640580383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 640580383 is about 25309.6895081706. The cubic root of 640580383 is about 862.0342967389.

The spelling of 640580383 in words is "six hundred forty million, five hundred eighty thousand, three hundred eighty-three".