111145727871 has 6 divisors (see below), whose sum is σ = 160543829160. Its totient is φ = 74097151908.

The previous prime is 111145727863. The next prime is 111145727897. The reversal of 111145727871 is 178727541111.

111145727871 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 4 + 572 + 7 + 8 + 71 = 666.

It is not a de Polignac number, because 111145727871 - 2³ = 111145727863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111145727471) 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 5 ways as a sum of consecutive naturals, for example, 6174762651 + ... + 6174762668.

It is an arithmetic number, because the mean of its divisors is an integer number (26757304860).

Almost surely, 2^111145727871 is an apocalyptic number.

111145727871 is a deficient number, since it is larger than the sum of its proper divisors (49398101289).

111145727871 is a wasteful number, since it uses less digits than its factorization.

111145727871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12349525325 (or 12349525322 counting only the distinct ones).

The product of its digits is 109760, while the sum is 45.

The spelling of 111145727871 in words is "one hundred eleven billion, one hundred forty-five million, seven hundred twenty-seven thousand, eight hundred seventy-one".