645603024 has 80 divisors (see below), whose sum is σ = 1878165504. Its totient is φ = 189321600.

The previous prime is 645603019. The next prime is 645603041. The reversal of 645603024 is 420306546.

It is a junction number, because it is equal to n+sod(n) for n = 645602982 and 645603000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3354 + ... + 36089.

Almost surely, 2^645603024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645603024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (939082752).

645603024 is an abundant number, since it is smaller than the sum of its proper divisors (1232562480).

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

645603024 is a wasteful number, since it uses less digits than its factorization.

645603024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39496 (or 39490 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 645603024 is about 25408.7194482524. The cubic root of 645603024 is about 864.2814369507.

The spelling of 645603024 in words is "six hundred forty-five million, six hundred three thousand, twenty-four".