205535880438269 has 2 divisors, whose sum is σ = 205535880438270. Its totient is φ = 205535880438268.

The previous prime is 205535880438263. The next prime is 205535880438281. The reversal of 205535880438269 is 962834088535502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171461085319225 + 34074795119044 = 13094315^2 + 5837362^2 .

It is a cyclic number.

It is not a de Polignac number, because 205535880438269 - 2⁸ = 205535880438013 is a prime.

It is a super-2 number, since 2×205535880438269² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 205535880438199 and 205535880438208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205535880438263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102767940219134 + 102767940219135.

It is an arithmetic number, because the mean of its divisors is an integer number (102767940219135).

Almost surely, 2^{205535880438269} is an apocalyptic number.

It is an amenable number.

205535880438269 is a deficient number, since it is larger than the sum of its proper divisors (1).

205535880438269 is an equidigital number, since it uses as much as digits as its factorization.

205535880438269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664000, while the sum is 68.

The spelling of 205535880438269 in words is "two hundred five trillion, five hundred thirty-five billion, eight hundred eighty million, four hundred thirty-eight thousand, two hundred sixty-nine".