111525666161 has 16 divisors (see below), whose sum is σ = 143230289664. Its totient is φ = 84403560384.

The previous prime is 111525666143. The next prime is 111525666163. The reversal of 111525666161 is 161666525111.

It is a happy number.

It is not a de Polignac number, because 111525666161 - 2⁶ = 111525666097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111525666163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26640446 + ... + 26644631.

It is an arithmetic number, because the mean of its divisors is an integer number (8951893104).

Almost surely, 2^111525666161 is an apocalyptic number.

It is an amenable number.

111525666161 is a deficient number, since it is larger than the sum of its proper divisors (31704623503).

111525666161 is a wasteful number, since it uses less digits than its factorization.

111525666161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53285120.

The product of its digits is 64800, while the sum is 41.

The spelling of 111525666161 in words is "one hundred eleven billion, five hundred twenty-five million, six hundred sixty-six thousand, one hundred sixty-one".