645573313000 has 256 divisors, whose sum is σ = 1892906496000. Its totient is φ = 200201760000.

The previous prime is 645573312997. The next prime is 645573313019. The reversal of 645573313000 is 313375546.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15301935 + ... + 15344065.

It is an arithmetic number, because the mean of its divisors is an integer number (7394166000).

Almost surely, 2^645573313000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 645573313000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (946453248000).

645573313000 is an abundant number, since it is smaller than the sum of its proper divisors (1247333183000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

645573313000 is a wasteful number, since it uses less digits than its factorization.

645573313000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42369 (or 42355 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 37.

Adding to 645573313000 its reverse (313375546), we get a palindrome (645886688546).

The spelling of 645573313000 in words is "six hundred forty-five billion, five hundred seventy-three million, three hundred thirteen thousand".