640527582 has 64 divisors (see below), whose sum is σ = 1401696000. Its totient is φ = 194358528.

The previous prime is 640527577. The next prime is 640527619. The reversal of 640527582 is 285725046.

It is a self number, because there is not a number n which added to its sum of digits gives 640527582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1034469 + ... + 1035087.

It is an arithmetic number, because the mean of its divisors is an integer number (21901500).

Almost surely, 2^640527582 is an apocalyptic number.

640527582 is an abundant number, since it is smaller than the sum of its proper divisors (761168418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640527582 is a wasteful number, since it uses less digits than its factorization.

640527582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985.

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 640527582 is about 25308.6463881417. The cubic root of 640527582 is about 862.0106111746.

The spelling of 640527582 in words is "six hundred forty million, five hundred twenty-seven thousand, five hundred eighty-two".