28430639663 has 2 divisors, whose sum is σ = 28430639664. Its totient is φ = 28430639662.

The previous prime is 28430639659. The next prime is 28430639711. The reversal of 28430639663 is 36693603482.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28430639663 - 2² = 28430639659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28430639623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14215319831 + 14215319832.

It is an arithmetic number, because the mean of its divisors is an integer number (14215319832).

Almost surely, 2^28430639663 is an apocalyptic number.

28430639663 is a deficient number, since it is larger than the sum of its proper divisors (1).

28430639663 is an equidigital number, since it uses as much as digits as its factorization.

28430639663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3359232, while the sum is 50.

The spelling of 28430639663 in words is "twenty-eight billion, four hundred thirty million, six hundred thirty-nine thousand, six hundred sixty-three".