28556354609 has 2 divisors, whose sum is σ = 28556354610. Its totient is φ = 28556354608.

The previous prime is 28556354591. The next prime is 28556354647. The reversal of 28556354609 is 90645365582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15720144400 + 12836210209 = 125380^2 + 113297^2 .

It is a cyclic number.

It is not a de Polignac number, because 28556354609 - 2³² = 24261387313 is a prime.

It is not a weakly prime, because it can be changed into another prime (28556354669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14278177304 + 14278177305.

It is an arithmetic number, because the mean of its divisors is an integer number (14278177305).

Almost surely, 2^28556354609 is an apocalyptic number.

It is an amenable number.

28556354609 is a deficient number, since it is larger than the sum of its proper divisors (1).

28556354609 is an equidigital number, since it uses as much as digits as its factorization.

28556354609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776000, while the sum is 53.

The spelling of 28556354609 in words is "twenty-eight billion, five hundred fifty-six million, three hundred fifty-four thousand, six hundred nine".