1155117266217 has 32 divisors (see below), whose sum is σ = 1747931996160. Its totient is φ = 753591399120.

The previous prime is 1155117266131. The next prime is 1155117266227. The reversal of 1155117266217 is 7126627115511.

1155117266217 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 1 + 17 + 2 + 6 + 621 + 7 = 666.

It is not a de Polignac number, because 1155117266217 - 2¹² = 1155117262121 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155117266227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9945792 + ... + 10061262.

It is an arithmetic number, because the mean of its divisors is an integer number (54622874880).

Almost surely, 2^{1155117266217} is an apocalyptic number.

It is an amenable number.

1155117266217 is a deficient number, since it is larger than the sum of its proper divisors (592814729943).

1155117266217 is a wasteful number, since it uses less digits than its factorization.

1155117266217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123410 (or 123404 counting only the distinct ones).

The product of its digits is 176400, while the sum is 45.

The spelling of 1155117266217 in words is "one trillion, one hundred fifty-five billion, one hundred seventeen million, two hundred sixty-six thousand, two hundred seventeen".