645113284 has 6 divisors (see below), whose sum is σ = 1128948254. Its totient is φ = 322556640.

The previous prime is 645113281. The next prime is 645113353. The reversal of 645113284 is 482311546.

645113284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 641608900 + 3504384 = 25330^2 + 1872^2 .

It is a super-2 number, since 2×645113284² = 832342298386529312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645113281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80639157 + ... + 80639164.

Almost surely, 2^645113284 is an apocalyptic number.

It is an amenable number.

645113284 is a deficient number, since it is larger than the sum of its proper divisors (483834970).

645113284 is a wasteful number, since it uses less digits than its factorization.

645113284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161278325 (or 161278323 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 645113284 is about 25399.0803770530. The cubic root of 645113284 is about 864.0628401511.

The spelling of 645113284 in words is "six hundred forty-five million, one hundred thirteen thousand, two hundred eighty-four".