645002996 has 24 divisors (see below), whose sum is σ = 1257572736. Its totient is φ = 286944320.

The previous prime is 645002929. The next prime is 645003017. The reversal of 645002996 is 699200546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153881 + ... + 158016.

It is an arithmetic number, because the mean of its divisors is an integer number (52398864).

Almost surely, 2^645002996 is an apocalyptic number.

It is an amenable number.

645002996 is a deficient number, since it is larger than the sum of its proper divisors (612569740).

645002996 is a wasteful number, since it uses less digits than its factorization.

645002996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311959 (or 311957 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 645002996 is about 25396.9091820245. The cubic root of 645002996 is about 864.0135975369.

The spelling of 645002996 in words is "six hundred forty-five million, two thousand, nine hundred ninety-six".