645945350 has 12 divisors (see below), whose sum is σ = 1201458444. Its totient is φ = 258378120.

The previous prime is 645945343. The next prime is 645945359. The reversal of 645945350 is 53549546.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 645945298 and 645945307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645945359) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6459404 + ... + 6459503.

It is an arithmetic number, because the mean of its divisors is an integer number (100121537).

Almost surely, 2^645945350 is an apocalyptic number.

645945350 is a deficient number, since it is larger than the sum of its proper divisors (555513094).

645945350 is a wasteful number, since it uses less digits than its factorization.

645945350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12918919 (or 12918914 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 41.

The square root of 645945350 is about 25415.4549437935. The cubic root of 645945350 is about 864.4341694700.

The spelling of 645945350 in words is "six hundred forty-five million, nine hundred forty-five thousand, three hundred fifty".