645463313 has 8 divisors (see below), whose sum is σ = 705449856. Its totient is φ = 585694800.

The previous prime is 645463277. The next prime is 645463339. The reversal of 645463313 is 313364546.

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

It is a cyclic number.

It is not a de Polignac number, because 645463313 - 2⁶ = 645463249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (645463393) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48281 + ... + 60182.

It is an arithmetic number, because the mean of its divisors is an integer number (88181232).

Almost surely, 2^645463313 is an apocalyptic number.

It is an amenable number.

645463313 is a deficient number, since it is larger than the sum of its proper divisors (59986543).

645463313 is a wasteful number, since it uses less digits than its factorization.

645463313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109015.

The product of its digits is 77760, while the sum is 35.

The square root of 645463313 is about 25405.9700267477. The cubic root of 645463313 is about 864.2190878338.

The spelling of 645463313 in words is "six hundred forty-five million, four hundred sixty-three thousand, three hundred thirteen".