643283586901 has 2 divisors, whose sum is σ = 643283586902. Its totient is φ = 643283586900.

The previous prime is 643283586887. The next prime is 643283586941. The reversal of 643283586901 is 109685382346.

643283586901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 476003404900 + 167280182001 = 689930^2 + 408999^2 .

It is a cyclic number.

It is not a de Polignac number, because 643283586901 - 2⁹ = 643283586389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (643283586941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321641793450 + 321641793451.

It is an arithmetic number, because the mean of its divisors is an integer number (321641793451).

Almost surely, 2^643283586901 is an apocalyptic number.

It is an amenable number.

643283586901 is a deficient number, since it is larger than the sum of its proper divisors (1).

643283586901 is an equidigital number, since it uses as much as digits as its factorization.

643283586901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7464960, while the sum is 55.

The spelling of 643283586901 in words is "six hundred forty-three billion, two hundred eighty-three million, five hundred eighty-six thousand, nine hundred one".