645030594 has 64 divisors (see below), whose sum is σ = 1547145600. Its totient is φ = 198023616.

The previous prime is 645030571. The next prime is 645030611. The reversal of 645030594 is 495030546.

It is a happy number.

645030594 is a `hidden beast` number, since 64 + 5 + 0 + 3 + 0 + 594 = 666.

It is an unprimeable number.

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, 450672 + ... + 452100.

It is an arithmetic number, because the mean of its divisors is an integer number (24174150).

Almost surely, 2^645030594 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645030594, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (773572800).

645030594 is an abundant number, since it is smaller than the sum of its proper divisors (902115006).

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

645030594 is a wasteful number, since it uses less digits than its factorization.

645030594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2096 (or 2090 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 645030594 is about 25397.4525100452. The cubic root of 645030594 is about 864.0259203258.

The spelling of 645030594 in words is "six hundred forty-five million, thirty thousand, five hundred ninety-four".