1117172217161 has 48 divisors (see below), whose sum is σ = 1526308272384. Its totient is φ = 795603600000.

The previous prime is 1117172217157. The next prime is 1117172217179. The reversal of 1117172217161 is 1617122717111.

It is not a de Polignac number, because 1117172217161 - 2² = 1117172217157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1117172217151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 609836 + ... + 1614386.

It is an arithmetic number, because the mean of its divisors is an integer number (31798089008).

Almost surely, 2^{1117172217161} is an apocalyptic number.

1117172217161 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1117172217161 is a deficient number, since it is larger than the sum of its proper divisors (409136055223).

1117172217161 is a wasteful number, since it uses less digits than its factorization.

1117172217161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004694 (or 1004683 counting only the distinct ones).

The product of its digits is 8232, while the sum is 38.

The spelling of 1117172217161 in words is "one trillion, one hundred seventeen billion, one hundred seventy-two million, two hundred seventeen thousand, one hundred sixty-one".