645168713 has 16 divisors (see below), whose sum is σ = 765434880. Its totient is φ = 532061376.

The previous prime is 645168707. The next prime is 645168749. The reversal of 645168713 is 317861546.

It is not a de Polignac number, because 645168713 - 2⁴ = 645168697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645168703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54056 + ... + 64902.

It is an arithmetic number, because the mean of its divisors is an integer number (47839680).

Almost surely, 2^645168713 is an apocalyptic number.

It is an amenable number.

645168713 is a deficient number, since it is larger than the sum of its proper divisors (120266167).

645168713 is a wasteful number, since it uses less digits than its factorization.

645168713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11176.

The product of its digits is 120960, while the sum is 41.

The square root of 645168713 is about 25400.1715151689. The cubic root of 645168713 is about 864.0875865890.

The spelling of 645168713 in words is "six hundred forty-five million, one hundred sixty-eight thousand, seven hundred thirteen".