645662326 has 8 divisors (see below), whose sum is σ = 968666400. Its totient is φ = 322773528.

The previous prime is 645662299. The next prime is 645662333. The reversal of 645662326 is 623266546.

645662326 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13101 + ... + 38248.

It is an arithmetic number, because the mean of its divisors is an integer number (121083300).

Almost surely, 2^645662326 is an apocalyptic number.

645662326 is a deficient number, since it is larger than the sum of its proper divisors (323004074).

645662326 is a wasteful number, since it uses less digits than its factorization.

645662326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57638.

The product of its digits is 311040, while the sum is 40.

The square root of 645662326 is about 25409.8863830596. The cubic root of 645662326 is about 864.3078990575.

The spelling of 645662326 in words is "six hundred forty-five million, six hundred sixty-two thousand, three hundred twenty-six".