645829532 has 12 divisors (see below), whose sum is σ = 1189686120. Its totient is φ = 305919216.

The previous prime is 645829529. The next prime is 645829543. The reversal of 645829532 is 235928546.

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 3 ways as a sum of consecutive naturals, for example, 4248803 + ... + 4248954.

It is an arithmetic number, because the mean of its divisors is an integer number (99140510).

Almost surely, 2^645829532 is an apocalyptic number.

It is an amenable number.

645829532 is a deficient number, since it is larger than the sum of its proper divisors (543856588).

645829532 is a wasteful number, since it uses less digits than its factorization.

645829532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8497780 (or 8497778 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The square root of 645829532 is about 25413.1763461398. The cubic root of 645829532 is about 864.3825020336.

The spelling of 645829532 in words is "six hundred forty-five million, eight hundred twenty-nine thousand, five hundred thirty-two".