645333316 has 12 divisors (see below), whose sum is σ = 1140298432. Its totient is φ = 319533768.

The previous prime is 645333289. The next prime is 645333323. The reversal of 645333316 is 613333546.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782760 + ... + 783583.

Almost surely, 2^645333316 is an apocalyptic number.

It is an amenable number.

645333316 is a deficient number, since it is larger than the sum of its proper divisors (494965116).

645333316 is a wasteful number, since it uses less digits than its factorization.

645333316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566450 (or 1566448 counting only the distinct ones).

The product of its digits is 58320, while the sum is 34.

The square root of 645333316 is about 25403.4115031820. The cubic root of 645333316 is about 864.1610657229.

The spelling of 645333316 in words is "six hundred forty-five million, three hundred thirty-three thousand, three hundred sixteen".