643536206039 has 2 divisors, whose sum is σ = 643536206040. Its totient is φ = 643536206038.

The previous prime is 643536206003. The next prime is 643536206101. The reversal of 643536206039 is 930602635346.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 643536206039 - 2¹² = 643536201943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 643536205984 and 643536206002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (643536208039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321768103019 + 321768103020.

It is an arithmetic number, because the mean of its divisors is an integer number (321768103020).

Almost surely, 2^643536206039 is an apocalyptic number.

643536206039 is a deficient number, since it is larger than the sum of its proper divisors (1).

643536206039 is an equidigital number, since it uses as much as digits as its factorization.

643536206039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 47.

The spelling of 643536206039 in words is "six hundred forty-three billion, five hundred thirty-six million, two hundred six thousand, thirty-nine".