643286513099 has 2 divisors, whose sum is σ = 643286513100. Its totient is φ = 643286513098.

The previous prime is 643286513053. The next prime is 643286513143. The reversal of 643286513099 is 990315682346.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 643286513099 - 2¹² = 643286509003 is a prime.

It is not a weakly prime, because it can be changed into another prime (643286513999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321643256549 + 321643256550.

It is an arithmetic number, because the mean of its divisors is an integer number (321643256550).

Almost surely, 2^643286513099 is an apocalyptic number.

643286513099 is a deficient number, since it is larger than the sum of its proper divisors (1).

643286513099 is an equidigital number, since it uses as much as digits as its factorization.

643286513099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8398080, while the sum is 56.

The spelling of 643286513099 in words is "six hundred forty-three billion, two hundred eighty-six million, five hundred thirteen thousand, ninety-nine".