645358285 has 16 divisors (see below), whose sum is σ = 909820800. Its totient is φ = 433247040.

The previous prime is 645358261. The next prime is 645358289. The reversal of 645358285 is 582853546.

It is not a de Polignac number, because 645358285 - 2⁵ = 645358253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645358289) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 450585 + ... + 452014.

It is an arithmetic number, because the mean of its divisors is an integer number (56863800).

Almost surely, 2^645358285 is an apocalyptic number.

645358285 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

645358285 is a deficient number, since it is larger than the sum of its proper divisors (264462515).

645358285 is a wasteful number, since it uses less digits than its factorization.

645358285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902628.

The product of its digits is 1152000, while the sum is 46.

The square root of 645358285 is about 25403.9029481692. The cubic root of 645358285 is about 864.1722108469.

The spelling of 645358285 in words is "six hundred forty-five million, three hundred fifty-eight thousand, two hundred eighty-five".