645016002 has 64 divisors (see below), whose sum is σ = 1372757760. Its totient is φ = 201636864.

The previous prime is 645015967. The next prime is 645016007. The reversal of 645016002 is 200610546.

It is not an unprimeable number, because it can be changed into a prime (645016007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2060598 + ... + 2060910.

It is an arithmetic number, because the mean of its divisors is an integer number (21449340).

Almost surely, 2^645016002 is an apocalyptic number.

645016002 is an abundant number, since it is smaller than the sum of its proper divisors (727741758).

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

645016002 is a wasteful number, since it uses less digits than its factorization.

645016002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 645016002 is about 25397.1652355140. The cubic root of 645016002 is about 864.0194048925.

Adding to 645016002 its reverse (200610546), we get a palindrome (845626548).

The spelling of 645016002 in words is "six hundred forty-five million, sixteen thousand, two".