28606801999 has 2 divisors, whose sum is σ = 28606802000. Its totient is φ = 28606801998.

The previous prime is 28606801991. The next prime is 28606802047. The reversal of 28606801999 is 99910860682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28606801999 - 2³ = 28606801991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28606801991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14303400999 + 14303401000.

It is an arithmetic number, because the mean of its divisors is an integer number (14303401000).

Almost surely, 2^28606801999 is an apocalyptic number.

28606801999 is a deficient number, since it is larger than the sum of its proper divisors (1).

28606801999 is an equidigital number, since it uses as much as digits as its factorization.

28606801999 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 58.

The spelling of 28606801999 in words is "twenty-eight billion, six hundred six million, eight hundred one thousand, nine hundred ninety-nine".