345545583523849 has 2 divisors, whose sum is σ = 345545583523850. Its totient is φ = 345545583523848.

The previous prime is 345545583523841. The next prime is 345545583523909. The reversal of 345545583523849 is 948325385545543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 326253003125625 + 19292580398224 = 18062475^2 + 4392332^2 .

It is an emirp because it is prime and its reverse (948325385545543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345545583523849 - 2³ = 345545583523841 is a prime.

It is not a weakly prime, because it can be changed into another prime (345545583523841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172772791761924 + 172772791761925.

It is an arithmetic number, because the mean of its divisors is an integer number (172772791761925).

Almost surely, 2^{345545583523849} is an apocalyptic number.

It is an amenable number.

345545583523849 is a deficient number, since it is larger than the sum of its proper divisors (1).

345545583523849 is an equidigital number, since it uses as much as digits as its factorization.

345545583523849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6220800000, while the sum is 73.

The spelling of 345545583523849 in words is "three hundred forty-five trillion, five hundred forty-five billion, five hundred eighty-three million, five hundred twenty-three thousand, eight hundred forty-nine".