9865780488269 has 2 divisors, whose sum is σ = 9865780488270. Its totient is φ = 9865780488268.

The previous prime is 9865780488253. The next prime is 9865780488313. The reversal of 9865780488269 is 9628840875689.

9865780488269 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9408482655625 + 457297832644 = 3067325^2 + 676238^2 .

It is a cyclic number.

It is not a de Polignac number, because 9865780488269 - 2⁴ = 9865780488253 is a prime.

It is a super-2 number, since 2×9865780488269² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9865780488193 and 9865780488202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9865780488209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4932890244134 + 4932890244135.

It is an arithmetic number, because the mean of its divisors is an integer number (4932890244135).

Almost surely, 2^{9865780488269} is an apocalyptic number.

It is an amenable number.

9865780488269 is a deficient number, since it is larger than the sum of its proper divisors (1).

9865780488269 is an equidigital number, since it uses as much as digits as its factorization.

9865780488269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3344302080, while the sum is 80.

The spelling of 9865780488269 in words is "nine trillion, eight hundred sixty-five billion, seven hundred eighty million, four hundred eighty-eight thousand, two hundred sixty-nine".