645539284 has 24 divisors (see below), whose sum is σ = 1222726400. Its totient is φ = 296439264.

The previous prime is 645539243. The next prime is 645539299. The reversal of 645539284 is 482935546.

645539284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20844 + ... + 41539.

Almost surely, 2^645539284 is an apocalyptic number.

It is an amenable number.

645539284 is a deficient number, since it is larger than the sum of its proper divisors (577187116).

645539284 is a wasteful number, since it uses less digits than its factorization.

645539284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62599 (or 62597 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 46.

The square root of 645539284 is about 25407.4651234632. The cubic root of 645539284 is about 864.2529926850.

It can be divided in two parts, 64553 and 9284, that added together give a palindrome (73837).

The spelling of 645539284 in words is "six hundred forty-five million, five hundred thirty-nine thousand, two hundred eighty-four".