728581879643 has 2 divisors, whose sum is σ = 728581879644. Its totient is φ = 728581879642.

The previous prime is 728581879631. The next prime is 728581879651. The reversal of 728581879643 is 346978185827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728581879643 - 2¹⁴ = 728581863259 is a prime.

It is not a weakly prime, because it can be changed into another prime (728581879673) 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, 364290939821 + 364290939822.

It is an arithmetic number, because the mean of its divisors is an integer number (364290939822).

Almost surely, 2^728581879643 is an apocalyptic number.

728581879643 is a deficient number, since it is larger than the sum of its proper divisors (1).

728581879643 is an equidigital number, since it uses as much as digits as its factorization.

728581879643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162570240, while the sum is 68.

The spelling of 728581879643 in words is "seven hundred twenty-eight billion, five hundred eighty-one million, eight hundred seventy-nine thousand, six hundred forty-three".