643062600647 has 2 divisors, whose sum is σ = 643062600648. Its totient is φ = 643062600646.

The previous prime is 643062600623. The next prime is 643062600721. The reversal of 643062600647 is 746006260346.

643062600647 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 is a cyclic number.

It is not a de Polignac number, because 643062600647 - 2⁸ = 643062600391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 643062600598 and 643062600607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (643062650647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321531300323 + 321531300324.

It is an arithmetic number, because the mean of its divisors is an integer number (321531300324).

Almost surely, 2^643062600647 is an apocalyptic number.

643062600647 is a deficient number, since it is larger than the sum of its proper divisors (1).

643062600647 is an equidigital number, since it uses as much as digits as its factorization.

643062600647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 44.

The spelling of 643062600647 in words is "six hundred forty-three billion, sixty-two million, six hundred thousand, six hundred forty-seven".