645170710 has 16 divisors (see below), whose sum is σ = 1188315216. Its totient is φ = 252066528.

The previous prime is 645170693. The next prime is 645170717. The reversal of 645170710 is 17071546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645170717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749769 + ... + 750628.

It is an arithmetic number, because the mean of its divisors is an integer number (74269701).

Almost surely, 2^645170710 is an apocalyptic number.

645170710 is a deficient number, since it is larger than the sum of its proper divisors (543144506).

645170710 is a wasteful number, since it uses less digits than its factorization.

645170710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500447.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 645170710 is about 25400.2108258967. The cubic root of 645170710 is about 864.0884781290.

The spelling of 645170710 in words is "six hundred forty-five million, one hundred seventy thousand, seven hundred ten".