1155481442218 has 4 divisors (see below), whose sum is σ = 1733222163330. Its totient is φ = 577740721108.

The previous prime is 1155481442123. The next prime is 1155481442329. The reversal of 1155481442218 is 8122441845511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1028871434889 + 126610007329 = 1014333^2 + 355823^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 288870360553 + ... + 288870360556.

Almost surely, 2^{1155481442218} is an apocalyptic number.

1155481442218 is a deficient number, since it is larger than the sum of its proper divisors (577740721112).

1155481442218 is an equidigital number, since it uses as much as digits as its factorization.

1155481442218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577740721111.

The product of its digits is 409600, while the sum is 46.

The spelling of 1155481442218 in words is "one trillion, one hundred fifty-five billion, four hundred eighty-one million, four hundred forty-two thousand, two hundred eighteen".