643106753041 has 2 divisors, whose sum is σ = 643106753042. Its totient is φ = 643106753040.

The previous prime is 643106752843. The next prime is 643106753101. The reversal of 643106753041 is 140357601346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 526344446016 + 116762307025 = 725496^2 + 341705^2 .

It is a cyclic number.

It is not a de Polignac number, because 643106753041 - 2¹³ = 643106744849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 643106752985 and 643106753003.

It is not a weakly prime, because it can be changed into another prime (643106754041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321553376520 + 321553376521.

It is an arithmetic number, because the mean of its divisors is an integer number (321553376521).

Almost surely, 2^643106753041 is an apocalyptic number.

It is an amenable number.

643106753041 is a deficient number, since it is larger than the sum of its proper divisors (1).

643106753041 is an equidigital number, since it uses as much as digits as its factorization.

643106753041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The spelling of 643106753041 in words is "six hundred forty-three billion, one hundred six million, seven hundred fifty-three thousand, forty-one".