28424254861 has 2 divisors, whose sum is σ = 28424254862. Its totient is φ = 28424254860.

The previous prime is 28424254853. The next prime is 28424254871. The reversal of 28424254861 is 16845242482.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22009206025 + 6415048836 = 148355^2 + 80094^2 .

It is a cyclic number.

It is not a de Polignac number, because 28424254861 - 2³ = 28424254853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28424254871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14212127430 + 14212127431.

It is an arithmetic number, because the mean of its divisors is an integer number (14212127431).

Almost surely, 2^28424254861 is an apocalyptic number.

It is an amenable number.

28424254861 is a deficient number, since it is larger than the sum of its proper divisors (1).

28424254861 is an equidigital number, since it uses as much as digits as its factorization.

28424254861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 983040, while the sum is 46.

The spelling of 28424254861 in words is "twenty-eight billion, four hundred twenty-four million, two hundred fifty-four thousand, eight hundred sixty-one".