645790910 has 8 divisors (see below), whose sum is σ = 1162423656. Its totient is φ = 258316360.

The previous prime is 645790909. The next prime is 645790913. The reversal of 645790910 is 19097546.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (645790913) 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, 32289536 + ... + 32289555.

It is an arithmetic number, because the mean of its divisors is an integer number (145302957).

Almost surely, 2^645790910 is an apocalyptic number.

645790910 is a deficient number, since it is larger than the sum of its proper divisors (516632746).

645790910 is a wasteful number, since it uses less digits than its factorization.

645790910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64579098.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 645790910 is about 25412.4164533796. The cubic root of 645790910 is about 864.3652710437.

The spelling of 645790910 in words is "six hundred forty-five million, seven hundred ninety thousand, nine hundred ten".