645006036 has 24 divisors (see below), whose sum is σ = 1505425824. Its totient is φ = 214943200.

The previous prime is 645005983. The next prime is 645006041. The reversal of 645006036 is 630600546.

It is a junction number, because it is equal to n+sod(n) for n = 645005994 and 645006012.

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, 77686 + ... + 85586.

It is an arithmetic number, because the mean of its divisors is an integer number (62726076).

Almost surely, 2^645006036 is an apocalyptic number.

It is an amenable number.

645006036 is an abundant number, since it is smaller than the sum of its proper divisors (860419788).

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

645006036 is a wasteful number, since it uses less digits than its factorization.

645006036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14711 (or 14709 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 645006036 is about 25396.9690317565. The cubic root of 645006036 is about 864.0149549452.

The spelling of 645006036 in words is "six hundred forty-five million, six thousand, thirty-six".