28149774511 has 2 divisors, whose sum is σ = 28149774512. Its totient is φ = 28149774510.

The previous prime is 28149774509. The next prime is 28149774571. The reversal of 28149774511 is 11547794182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28149774511 - 2¹ = 28149774509 is a prime.

Together with 28149774509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28149774571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14074887255 + 14074887256.

It is an arithmetic number, because the mean of its divisors is an integer number (14074887256).

Almost surely, 2^28149774511 is an apocalyptic number.

28149774511 is a deficient number, since it is larger than the sum of its proper divisors (1).

28149774511 is an equidigital number, since it uses as much as digits as its factorization.

28149774511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 49.

The spelling of 28149774511 in words is "twenty-eight billion, one hundred forty-nine million, seven hundred seventy-four thousand, five hundred eleven".