628889433643 has 2 divisors, whose sum is σ = 628889433644. Its totient is φ = 628889433642.

The previous prime is 628889433611. The next prime is 628889433659. The reversal of 628889433643 is 346334988826.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 628889433643 - 2⁵ = 628889433611 is a prime.

It is not a weakly prime, because it can be changed into another prime (628889433743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 314444716821 + 314444716822.

It is an arithmetic number, because the mean of its divisors is an integer number (314444716822).

Almost surely, 2^628889433643 is an apocalyptic number.

628889433643 is a deficient number, since it is larger than the sum of its proper divisors (1).

628889433643 is an equidigital number, since it uses as much as digits as its factorization.

628889433643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 143327232, while the sum is 64.

The spelling of 628889433643 in words is "six hundred twenty-eight billion, eight hundred eighty-nine million, four hundred thirty-three thousand, six hundred forty-three".