645017001 has 8 divisors (see below), whose sum is σ = 864479520. Its totient is φ = 427782912.

The previous prime is 645016951. The next prime is 645017011. The reversal of 645017001 is 100710546.

645017001 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 not a de Polignac number, because 645017001 - 2¹³ = 645008809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (645017011) 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, 556431 + ... + 557588.

It is an arithmetic number, because the mean of its divisors is an integer number (108059940).

Almost surely, 2^645017001 is an apocalyptic number.

It is an amenable number.

645017001 is a deficient number, since it is larger than the sum of its proper divisors (219462519).

645017001 is a wasteful number, since it uses less digits than its factorization.

645017001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114215.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 645017001 is about 25397.1849030557. The cubic root of 645017001 is about 864.0198509564.

Adding to 645017001 its reverse (100710546), we get a palindrome (745727547).

The spelling of 645017001 in words is "six hundred forty-five million, seventeen thousand, one".