645302641001 has 2 divisors, whose sum is σ = 645302641002. Its totient is φ = 645302641000.

The previous prime is 645302640989. The next prime is 645302641021. The reversal of 645302641001 is 100146203546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 398741731600 + 246560909401 = 631460^2 + 496549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645302641001 is a prime.

It is not a weakly prime, because it can be changed into another prime (645302641021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322651320500 + 322651320501.

It is an arithmetic number, because the mean of its divisors is an integer number (322651320501).

Almost surely, 2^645302641001 is an apocalyptic number.

It is an amenable number.

645302641001 is a deficient number, since it is larger than the sum of its proper divisors (1).

645302641001 is an equidigital number, since it uses as much as digits as its factorization.

645302641001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 645302641001 its reverse (100146203546), we get a palindrome (745448844547).

The spelling of 645302641001 in words is "six hundred forty-five billion, three hundred two million, six hundred forty-one thousand, one".