645570002 has 48 divisors (see below), whose sum is σ = 1301181408. Its totient is φ = 236718720.

The previous prime is 645570001. The next prime is 645570031. The reversal of 645570002 is 200075546.

It is not an unprimeable number, because it can be changed into a prime (645570001) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 713 + ... + 35939.

It is an arithmetic number, because the mean of its divisors is an integer number (27107946).

Almost surely, 2^645570002 is an apocalyptic number.

645570002 is an abundant number, since it is smaller than the sum of its proper divisors (655611406).

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

645570002 is a wasteful number, since it uses less digits than its factorization.

645570002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35271 (or 35264 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 645570002 is about 25408.0696236452. The cubic root of 645570002 is about 864.2667009663.

The spelling of 645570002 in words is "six hundred forty-five million, five hundred seventy thousand, two".