161134911 has 12 divisors (see below), whose sum is σ = 266000592. Its totient is φ = 92077056.

The previous prime is 161134873. The next prime is 161134927. The reversal of 161134911 is 119431161.

161134911 is a `hidden beast` number, since 1 + 611 + 3 + 49 + 1 + 1 = 666.

It is not a de Polignac number, because 161134911 - 2⁹ = 161134399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161138911) 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 11 ways as a sum of consecutive naturals, for example, 1278786 + ... + 1278911.

It is an arithmetic number, because the mean of its divisors is an integer number (22166716).

Almost surely, 2^161134911 is an apocalyptic number.

161134911 is a deficient number, since it is larger than the sum of its proper divisors (104865681).

161134911 is a wasteful number, since it uses less digits than its factorization.

161134911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2557710 (or 2557707 counting only the distinct ones).

The product of its digits is 648, while the sum is 27.

The square root of 161134911 is about 12693.8926653726. The cubic root of 161134911 is about 544.1640929700.

The spelling of 161134911 in words is "one hundred sixty-one million, one hundred thirty-four thousand, nine hundred eleven".