645036207 has 16 divisors (see below), whose sum is σ = 895744512. Its totient is φ = 412503840.

The previous prime is 645036199. The next prime is 645036233. The reversal of 645036207 is 702630546.

It is not a de Polignac number, because 645036207 - 2³ = 645036199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645036247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33043 + ... + 48804.

It is an arithmetic number, because the mean of its divisors is an integer number (55984032).

Almost surely, 2^645036207 is an apocalyptic number.

645036207 is a deficient number, since it is larger than the sum of its proper divisors (250708305).

645036207 is a wasteful number, since it uses less digits than its factorization.

645036207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81958.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 645036207 is about 25397.5630130137. The cubic root of 645036207 is about 864.0284265446.

The spelling of 645036207 in words is "six hundred forty-five million, thirty-six thousand, two hundred seven".