645002002 has 8 divisors (see below), whose sum is σ = 969120000. Its totient is φ = 321962004.

The previous prime is 645001943. The next prime is 645002003. The reversal of 645002002 is 200200546.

645002002 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 an unprimeable number, because it can be changed into a prime (645002003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268002 + ... + 270397.

It is an arithmetic number, because the mean of its divisors is an integer number (121140000).

Almost surely, 2^645002002 is an apocalyptic number.

645002002 is a deficient number, since it is larger than the sum of its proper divisors (324117998).

645002002 is a wasteful number, since it uses less digits than its factorization.

645002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539000.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 645002002 is about 25396.8896127065. The cubic root of 645002002 is about 864.0131536992.

Adding to 645002002 its reverse (200200546), we get a palindrome (845202548).

The spelling of 645002002 in words is "six hundred forty-five million, two thousand, two".