1155481442217 has 64 divisors (see below), whose sum is σ = 1835400384000. Its totient is φ = 715878180864.

The previous prime is 1155481442123. The next prime is 1155481442329. The reversal of 1155481442217 is 7122441845511.

1155481442217 is a `hidden beast` number, since 1 + 1 + 554 + 81 + 4 + 4 + 2 + 2 + 17 = 666.

It is not a de Polignac number, because 1155481442217 - 2¹² = 1155481438121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155481442617) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 30333259 + ... + 30371327.

It is an arithmetic number, because the mean of its divisors is an integer number (28678131000).

Almost surely, 2^{1155481442217} is an apocalyptic number.

1155481442217 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1155481442217 is a deficient number, since it is larger than the sum of its proper divisors (679918941783).

1155481442217 is a wasteful number, since it uses less digits than its factorization.

1155481442217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38927 (or 38921 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The spelling of 1155481442217 in words is "one trillion, one hundred fifty-five billion, four hundred eighty-one million, four hundred forty-two thousand, two hundred seventeen".