645016012 has 12 divisors (see below), whose sum is σ = 1129059736. Its totient is φ = 322427520.

The previous prime is 645016007. The next prime is 645016033. The reversal of 645016012 is 210610546.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187 + ... + 35917.

Almost surely, 2^645016012 is an apocalyptic number.

It is an amenable number.

645016012 is a deficient number, since it is larger than the sum of its proper divisors (484043724).

645016012 is a wasteful number, since it uses less digits than its factorization.

645016012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40248 (or 40246 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 645016012 is about 25397.1654323863. The cubic root of 645016012 is about 864.0194093576.

Adding to 645016012 its reverse (210610546), we get a palindrome (855626558).

The spelling of 645016012 in words is "six hundred forty-five million, sixteen thousand, twelve".