645446933 has 8 divisors (see below), whose sum is σ = 652160256. Its totient is φ = 638766000.

The previous prime is 645446909. The next prime is 645446951. The reversal of 645446933 is 339644546.

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

It is a cyclic number.

It is not a de Polignac number, because 645446933 - 2⁶ = 645446869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645442933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33035 + ... + 48807.

It is an arithmetic number, because the mean of its divisors is an integer number (81520032).

Almost surely, 2^645446933 is an apocalyptic number.

It is an amenable number.

645446933 is a deficient number, since it is larger than the sum of its proper divisors (6713323).

645446933 is a wasteful number, since it uses less digits than its factorization.

645446933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16195.

The product of its digits is 933120, while the sum is 44.

The square root of 645446933 is about 25405.6476595264. The cubic root of 645446933 is about 864.2117773081.

The spelling of 645446933 in words is "six hundred forty-five million, four hundred forty-six thousand, nine hundred thirty-three".