645350368 has 96 divisors (see below), whose sum is σ = 1409788800. Its totient is φ = 288976896.

The previous prime is 645350357. The next prime is 645350383. The reversal of 645350368 is 863053546.

645350368 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 645350368.

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, 2398938 + ... + 2399206.

It is an arithmetic number, because the mean of its divisors is an integer number (14685300).

Almost surely, 2^645350368 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 645350368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (704894400).

645350368 is an abundant number, since it is smaller than the sum of its proper divisors (764438432).

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

645350368 is a wasteful number, since it uses less digits than its factorization.

645350368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The square root of 645350368 is about 25403.7471251782. The cubic root of 645350368 is about 864.1686770582.

The spelling of 645350368 in words is "six hundred forty-five million, three hundred fifty thousand, three hundred sixty-eight".