12340578729169 has 2 divisors, whose sum is σ = 12340578729170. Its totient is φ = 12340578729168.

The previous prime is 12340578729133. The next prime is 12340578729173. The reversal of 12340578729169 is 96192787504321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11359171493569 + 981407235600 = 3370337^2 + 990660^2 .

It is a cyclic number.

It is not a de Polignac number, because 12340578729169 - 2²³ = 12340570340561 is a prime.

It is a super-2 number, since 2×12340578729169² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12340578729169.

It is not a weakly prime, because it can be changed into another prime (12340578723169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6170289364584 + 6170289364585.

It is an arithmetic number, because the mean of its divisors is an integer number (6170289364585).

It is a 1-persistent number, because it is pandigital, but 2⋅12340578729169 = 24681157458338 is not.

Almost surely, 2^{12340578729169} is an apocalyptic number.

It is an amenable number.

12340578729169 is a deficient number, since it is larger than the sum of its proper divisors (1).

12340578729169 is an equidigital number, since it uses as much as digits as its factorization.

12340578729169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45722880, while the sum is 64.

The spelling of 12340578729169 in words is "twelve trillion, three hundred forty billion, five hundred seventy-eight million, seven hundred twenty-nine thousand, one hundred sixty-nine".