28669810811 has 2 divisors, whose sum is σ = 28669810812. Its totient is φ = 28669810810.

The previous prime is 28669810801. The next prime is 28669810853. The reversal of 28669810811 is 11801896682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28669810811 - 2⁶ = 28669810747 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28669810811.

It is not a weakly prime, because it can be changed into another prime (28669810801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14334905405 + 14334905406.

It is an arithmetic number, because the mean of its divisors is an integer number (14334905406).

Almost surely, 2^28669810811 is an apocalyptic number.

28669810811 is a deficient number, since it is larger than the sum of its proper divisors (1).

28669810811 is an equidigital number, since it uses as much as digits as its factorization.

28669810811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 50.

The spelling of 28669810811 in words is "twenty-eight billion, six hundred sixty-nine million, eight hundred ten thousand, eight hundred eleven".