645500306 has 8 divisors (see below), whose sum is σ = 1056273264. Its totient is φ = 293409220.

The previous prime is 645500239. The next prime is 645500327. The reversal of 645500306 is 603005546.

645500306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14670440 + ... + 14670483.

It is an arithmetic number, because the mean of its divisors is an integer number (132034158).

Almost surely, 2^645500306 is an apocalyptic number.

645500306 is a deficient number, since it is larger than the sum of its proper divisors (410772958).

645500306 is a wasteful number, since it uses less digits than its factorization.

645500306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29340936.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 645500306 is about 25406.6980538597. The cubic root of 645500306 is about 864.2355976521.

The spelling of 645500306 in words is "six hundred forty-five million, five hundred thousand, three hundred six".