645746314 has 4 divisors (see below), whose sum is σ = 968619474. Its totient is φ = 322873156.

The previous prime is 645746303. The next prime is 645746317. The reversal of 645746314 is 413647546.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 609349225 + 36397089 = 24685^2 + 6033^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (645746317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 161436577 + ... + 161436580.

Almost surely, 2^645746314 is an apocalyptic number.

645746314 is a deficient number, since it is larger than the sum of its proper divisors (322873160).

645746314 is a wasteful number, since it uses less digits than its factorization.

645746314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322873159.

The product of its digits is 241920, while the sum is 40.

The square root of 645746314 is about 25411.5389931425. The cubic root of 645746314 is about 864.3453739323.

The spelling of 645746314 in words is "six hundred forty-five million, seven hundred forty-six thousand, three hundred fourteen".