645302044 has 6 divisors (see below), whose sum is σ = 1129278584. Its totient is φ = 322651020.

The previous prime is 645302039. The next prime is 645302059. The reversal of 645302044 is 440203546.

645302044 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 as a sum of consecutive naturals, namely, 80662752 + ... + 80662759.

Almost surely, 2^645302044 is an apocalyptic number.

It is an amenable number.

645302044 is a deficient number, since it is larger than the sum of its proper divisors (483976540).

645302044 is a wasteful number, since it uses less digits than its factorization.

645302044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161325515 (or 161325513 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 645302044 is about 25402.7959878435. The cubic root of 645302044 is about 864.1471067962.

The spelling of 645302044 in words is "six hundred forty-five million, three hundred two thousand, forty-four".