643682402383 has 2 divisors, whose sum is σ = 643682402384. Its totient is φ = 643682402382.

The previous prime is 643682402347. The next prime is 643682402387. The reversal of 643682402383 is 383204286346.

643682402383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 643682402383 - 2⁹ = 643682401871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (643682402387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321841201191 + 321841201192.

It is an arithmetic number, because the mean of its divisors is an integer number (321841201192).

Almost surely, 2^643682402383 is an apocalyptic number.

643682402383 is a deficient number, since it is larger than the sum of its proper divisors (1).

643682402383 is an equidigital number, since it uses as much as digits as its factorization.

643682402383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3981312, while the sum is 49.

The spelling of 643682402383 in words is "six hundred forty-three billion, six hundred eighty-two million, four hundred two thousand, three hundred eighty-three".