645375282 has 16 divisors (see below), whose sum is σ = 1292711232. Its totient is φ = 214798320.

The previous prime is 645375281. The next prime is 645375287. The reversal of 645375282 is 282573546.

It is not an unprimeable number, because it can be changed into a prime (645375281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77398 + ... + 85329.

It is an arithmetic number, because the mean of its divisors is an integer number (80794452).

Almost surely, 2^645375282 is an apocalyptic number.

645375282 is an abundant number, since it is smaller than the sum of its proper divisors (647335950).

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

645375282 is a wasteful number, since it uses less digits than its factorization.

645375282 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163393.

The product of its digits is 403200, while the sum is 42.

The square root of 645375282 is about 25404.2374811762. The cubic root of 645375282 is about 864.1797974369.

The spelling of 645375282 in words is "six hundred forty-five million, three hundred seventy-five thousand, two hundred eighty-two".