645899314 has 8 divisors (see below), whose sum is σ = 985270320. Its totient is φ = 317475876.

The previous prime is 645899311. The next prime is 645899323. The reversal of 645899314 is 413998546.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (645899311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2736744 + ... + 2736979.

It is an arithmetic number, because the mean of its divisors is an integer number (123158790).

Almost surely, 2^645899314 is an apocalyptic number.

645899314 is a deficient number, since it is larger than the sum of its proper divisors (339371006).

645899314 is a wasteful number, since it uses less digits than its factorization.

645899314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5473784.

The product of its digits is 933120, while the sum is 49.

The square root of 645899314 is about 25414.5492582497. The cubic root of 645899314 is about 864.4136331419.

The spelling of 645899314 in words is "six hundred forty-five million, eight hundred ninety-nine thousand, three hundred fourteen".