645000594999 has 4 divisors (see below), whose sum is σ = 860000793336. Its totient is φ = 430000396664.

The previous prime is 645000594929. The next prime is 645000595027. The reversal of 645000594999 is 999495000546.

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

It is a cyclic number.

It is not a de Polignac number, because 645000594999 - 2²⁴ = 644983817783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645000594929) 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, 107500099164 + ... + 107500099169.

It is an arithmetic number, because the mean of its divisors is an integer number (215000198334).

Almost surely, 2^645000594999 is an apocalyptic number.

645000594999 is a deficient number, since it is larger than the sum of its proper divisors (215000198337).

645000594999 is a wasteful number, since it uses less digits than its factorization.

645000594999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215000198336.

The product of its (nonzero) digits is 15746400, while the sum is 60.

The spelling of 645000594999 in words is "six hundred forty-five billion, five hundred ninety-four thousand, nine hundred ninety-nine".