640582611 has 8 divisors (see below), whose sum is σ = 854630400. Its totient is φ = 426794952.

The previous prime is 640582609. The next prime is 640582699. The reversal of 640582611 is 116285046.

640582611 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 not a de Polignac number, because 640582611 - 2¹ = 640582609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640582601) 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, 59211 + ... + 69188.

It is an arithmetic number, because the mean of its divisors is an integer number (106828800).

Almost surely, 2^640582611 is an apocalyptic number.

640582611 is a deficient number, since it is larger than the sum of its proper divisors (214047789).

640582611 is a wasteful number, since it uses less digits than its factorization.

640582611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130065.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 640582611 is about 25309.7335228959. The cubic root of 640582611 is about 862.0352961504.

The spelling of 640582611 in words is "six hundred forty million, five hundred eighty-two thousand, six hundred eleven".