18782846344385 has 8 divisors (see below), whose sum is σ = 22540072925736. Its totient is φ = 15025838867200.

The previous prime is 18782846344357. The next prime is 18782846344391. The reversal of 18782846344385 is 58344364828781.

It can be written as a sum of positive squares in 4 ways, for example, as 960188331664 + 17822658012721 = 979892^2 + 4221689^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18782846344385 - 2⁶ = 18782846344321 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54587384 + ... + 54930393.

It is an arithmetic number, because the mean of its divisors is an integer number (2817509115717).

Almost surely, 2^{18782846344385} is an apocalyptic number.

It is an amenable number.

18782846344385 is a deficient number, since it is larger than the sum of its proper divisors (3757226581351).

18782846344385 is a wasteful number, since it uses less digits than its factorization.

18782846344385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109552083.

The product of its digits is 990904320, while the sum is 71.

The spelling of 18782846344385 in words is "eighteen trillion, seven hundred eighty-two billion, eight hundred forty-six million, three hundred forty-four thousand, three hundred eighty-five".