28366753609 has 2 divisors, whose sum is σ = 28366753610. Its totient is φ = 28366753608.

The previous prime is 28366753607. The next prime is 28366753619. The reversal of 28366753609 is 90635766382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22938011209 + 5428742400 = 151453^2 + 73680^2 .

It is a cyclic number.

It is not a de Polignac number, because 28366753609 - 2¹ = 28366753607 is a prime.

Together with 28366753607, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28366753609.

It is not a weakly prime, because it can be changed into another prime (28366753601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14183376804 + 14183376805.

It is an arithmetic number, because the mean of its divisors is an integer number (14183376805).

Almost surely, 2^28366753609 is an apocalyptic number.

It is an amenable number.

28366753609 is a deficient number, since it is larger than the sum of its proper divisors (1).

28366753609 is an equidigital number, since it uses as much as digits as its factorization.

28366753609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 28366753609 in words is "twenty-eight billion, three hundred sixty-six million, seven hundred fifty-three thousand, six hundred nine".