28380826583609 has 2 divisors, whose sum is σ = 28380826583610. Its totient is φ = 28380826583608.

The previous prime is 28380826583569. The next prime is 28380826583633. The reversal of 28380826583609 is 90638562808382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24077471334400 + 4303355249209 = 4906880^2 + 2074453^2 .

It is a cyclic number.

It is not a de Polignac number, because 28380826583609 - 2²⁸ = 28380558148153 is a prime.

It is not a weakly prime, because it can be changed into another prime (28380826583509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14190413291804 + 14190413291805.

It is an arithmetic number, because the mean of its divisors is an integer number (14190413291805).

Almost surely, 2^{28380826583609} is an apocalyptic number.

It is an amenable number.

28380826583609 is a deficient number, since it is larger than the sum of its proper divisors (1).

28380826583609 is an equidigital number, since it uses as much as digits as its factorization.

28380826583609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238878720, while the sum is 68.

The spelling of 28380826583609 in words is "twenty-eight trillion, three hundred eighty billion, eight hundred twenty-six million, five hundred eighty-three thousand, six hundred nine".