645354300 has 72 divisors (see below), whose sum is σ = 1883848176. Its totient is φ = 170562560.

The previous prime is 645354293. The next prime is 645354317. The reversal of 645354300 is 3453546.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24382 + ... + 43418.

It is an arithmetic number, because the mean of its divisors is an integer number (26164558).

Almost surely, 2^645354300 is an apocalyptic number.

645354300 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645354300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (941924088).

645354300 is an abundant number, since it is smaller than the sum of its proper divisors (1238493876).

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

645354300 is a wasteful number, since it uses less digits than its factorization.

645354300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19167 (or 19160 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 30.

The square root of 645354300 is about 25403.8245152182. The cubic root of 645354300 is about 864.1704321278.

The spelling of 645354300 in words is "six hundred forty-five million, three hundred fifty-four thousand, three hundred".