643450159783 has 16 divisors (see below), whose sum is σ = 699779031840. Its totient is φ = 589177552896.

The previous prime is 643450159741. The next prime is 643450159871. The reversal of 643450159783 is 387951054346.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-643450159783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743450159783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7688160 + ... + 7771402.

It is an arithmetic number, because the mean of its divisors is an integer number (43736189490).

Almost surely, 2^643450159783 is an apocalyptic number.

643450159783 is a deficient number, since it is larger than the sum of its proper divisors (56328872057).

643450159783 is a wasteful number, since it uses less digits than its factorization.

643450159783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95586.

The product of its (nonzero) digits is 10886400, while the sum is 55.

The spelling of 643450159783 in words is "six hundred forty-three billion, four hundred fifty million, one hundred fifty-nine thousand, seven hundred eighty-three".