28517771742369 has 48 divisors (see below), whose sum is σ = 47635245024192. Its totient is φ = 15041973324672.

The previous prime is 28517771742349. The next prime is 28517771742371. The reversal of 28517771742369 is 96324717771582.

It is not a de Polignac number, because 28517771742369 - 2⁹ = 28517771741857 is a prime.

It is a super-2 number, since 2×28517771742369² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28517771742349) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 89529982 + ... + 89847944.

It is an arithmetic number, because the mean of its divisors is an integer number (992400938004).

Almost surely, 2^{28517771742369} is an apocalyptic number.

It is an amenable number.

28517771742369 is a deficient number, since it is larger than the sum of its proper divisors (19117473281823).

28517771742369 is a wasteful number, since it uses less digits than its factorization.

28517771742369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364926 (or 364919 counting only the distinct ones).

The product of its digits is 248935680, while the sum is 69.

The spelling of 28517771742369 in words is "twenty-eight trillion, five hundred seventeen billion, seven hundred seventy-one million, seven hundred forty-two thousand, three hundred sixty-nine".