28842975992681 has 2 divisors, whose sum is σ = 28842975992682. Its totient is φ = 28842975992680.

The previous prime is 28842975992599. The next prime is 28842975992729. The reversal of 28842975992681 is 18629957924882.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28502614598656 + 340361394025 = 5338784^2 + 583405^2 .

It is a cyclic number.

It is not a de Polignac number, because 28842975992681 - 2¹⁰ = 28842975991657 is a prime.

It is a super-2 number, since 2×28842975992681² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28842975992596 and 28842975992605.

It is not a weakly prime, because it can be changed into another prime (28842975992881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14421487996340 + 14421487996341.

It is an arithmetic number, because the mean of its divisors is an integer number (14421487996341).

Almost surely, 2^{28842975992681} is an apocalyptic number.

It is an amenable number.

28842975992681 is a deficient number, since it is larger than the sum of its proper divisors (1).

28842975992681 is an equidigital number, since it uses as much as digits as its factorization.

28842975992681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2508226560, while the sum is 80.

The spelling of 28842975992681 in words is "twenty-eight trillion, eight hundred forty-two billion, nine hundred seventy-five million, nine hundred ninety-two thousand, six hundred eighty-one".