28534431811 has 2 divisors, whose sum is σ = 28534431812. Its totient is φ = 28534431810.

The previous prime is 28534431769. The next prime is 28534431817. The reversal of 28534431811 is 11813443582.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28534431811 is a prime.

It is not a weakly prime, because it can be changed into another prime (28534431817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14267215905 + 14267215906.

It is an arithmetic number, because the mean of its divisors is an integer number (14267215906).

Almost surely, 2^28534431811 is an apocalyptic number.

28534431811 is a deficient number, since it is larger than the sum of its proper divisors (1).

28534431811 is an equidigital number, since it uses as much as digits as its factorization.

28534431811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 40.

The spelling of 28534431811 in words is "twenty-eight billion, five hundred thirty-four million, four hundred thirty-one thousand, eight hundred eleven".