1243243455055 has 8 divisors (see below), whose sum is σ = 1705019595552. Its totient is φ = 852509797728.

The previous prime is 1243243455019. The next prime is 1243243455061. The reversal of 1243243455055 is 5505543423421.

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

It is a cyclic number.

It is not a de Polignac number, because 1243243455055 - 2²⁵ = 1243209900623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17760620752 + ... + 17760620821.

It is an arithmetic number, because the mean of its divisors is an integer number (213127449444).

Almost surely, 2^{1243243455055} is an apocalyptic number.

1243243455055 is a deficient number, since it is larger than the sum of its proper divisors (461776140497).

1243243455055 is an equidigital number, since it uses as much as digits as its factorization.

1243243455055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35521241585.

The product of its (nonzero) digits is 1440000, while the sum is 43.

Adding to 1243243455055 its reverse (5505543423421), we get a palindrome (6748786878476).

The spelling of 1243243455055 in words is "one trillion, two hundred forty-three billion, two hundred forty-three million, four hundred fifty-five thousand, fifty-five".