645356284 has 6 divisors (see below), whose sum is σ = 1129373504. Its totient is φ = 322678140.

The previous prime is 645356267. The next prime is 645356311. The reversal of 645356284 is 482653546.

It is a self number, because there is not a number n which added to its sum of digits gives 645356284.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80669532 + ... + 80669539.

Almost surely, 2^645356284 is an apocalyptic number.

It is an amenable number.

645356284 is a deficient number, since it is larger than the sum of its proper divisors (484017220).

645356284 is a wasteful number, since it uses less digits than its factorization.

645356284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161339075 (or 161339073 counting only the distinct ones).

The product of its digits is 691200, while the sum is 43.

The square root of 645356284 is about 25403.8635644266. The cubic root of 645356284 is about 864.1713176942.

The spelling of 645356284 in words is "six hundred forty-five million, three hundred fifty-six thousand, two hundred eighty-four".