28553748257 has 2 divisors, whose sum is σ = 28553748258. Its totient is φ = 28553748256.

The previous prime is 28553748241. The next prime is 28553748263. The reversal of 28553748257 is 75284735582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20255267041 + 8298481216 = 142321^2 + 91096^2 .

It is a cyclic number.

It is not a de Polignac number, because 28553748257 - 2⁴ = 28553748241 is a prime.

It is not a weakly prime, because it can be changed into another prime (28553748287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14276874128 + 14276874129.

It is an arithmetic number, because the mean of its divisors is an integer number (14276874129).

Almost surely, 2^28553748257 is an apocalyptic number.

It is an amenable number.

28553748257 is a deficient number, since it is larger than the sum of its proper divisors (1).

28553748257 is an equidigital number, since it uses as much as digits as its factorization.

28553748257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816000, while the sum is 56.

The spelling of 28553748257 in words is "twenty-eight billion, five hundred fifty-three million, seven hundred forty-eight thousand, two hundred fifty-seven".