169400266549 has 2 divisors, whose sum is σ = 169400266550. Its totient is φ = 169400266548.

The previous prime is 169400266547. The next prime is 169400266591. The reversal of 169400266549 is 945662004961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147156632100 + 22243634449 = 383610^2 + 149143^2 .

It is a cyclic number.

It is not a de Polignac number, because 169400266549 - 2¹ = 169400266547 is a prime.

Together with 169400266547, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 169400266496 and 169400266505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (169400266547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84700133274 + 84700133275.

It is an arithmetic number, because the mean of its divisors is an integer number (84700133275).

Almost surely, 2^169400266549 is an apocalyptic number.

It is an amenable number.

169400266549 is a deficient number, since it is larger than the sum of its proper divisors (1).

169400266549 is an equidigital number, since it uses as much as digits as its factorization.

169400266549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 169400266549 in words is "one hundred sixty-nine billion, four hundred million, two hundred sixty-six thousand, five hundred forty-nine".