645304747234201 has 2 divisors, whose sum is σ = 645304747234202. Its totient is φ = 645304747234200.

The previous prime is 645304747234019. The next prime is 645304747234223. The reversal of 645304747234201 is 102432747403546.

645304747234201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 347920792443225 + 297383954790976 = 18652635^2 + 17244824^2 .

It is a cyclic number.

It is not a de Polignac number, because 645304747234201 - 2¹⁷ = 645304747103129 is a prime.

It is not a weakly prime, because it can be changed into another prime (645304747234261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322652373617100 + 322652373617101.

It is an arithmetic number, because the mean of its divisors is an integer number (322652373617101).

Almost surely, 2^{645304747234201} is an apocalyptic number.

It is an amenable number.

645304747234201 is a deficient number, since it is larger than the sum of its proper divisors (1).

645304747234201 is an equidigital number, since it uses as much as digits as its factorization.

645304747234201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13547520, while the sum is 52.

The spelling of 645304747234201 in words is "six hundred forty-five trillion, three hundred four billion, seven hundred forty-seven million, two hundred thirty-four thousand, two hundred one".