28001554523 has 2 divisors, whose sum is σ = 28001554524. Its totient is φ = 28001554522.

The previous prime is 28001554519. The next prime is 28001554531. The reversal of 28001554523 is 32545510082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28001554523 - 2² = 28001554519 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (28001557523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14000777261 + 14000777262.

It is an arithmetic number, because the mean of its divisors is an integer number (14000777262).

Almost surely, 2^28001554523 is an apocalyptic number.

28001554523 is a deficient number, since it is larger than the sum of its proper divisors (1).

28001554523 is an equidigital number, since it uses as much as digits as its factorization.

28001554523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48000, while the sum is 35.

The spelling of 28001554523 in words is "twenty-eight billion, one million, five hundred fifty-four thousand, five hundred twenty-three".