111671731523869 has 16 divisors (see below), whose sum is σ = 131989570511040. Its totient is φ = 93325958933760.

The previous prime is 111671731523843. The next prime is 111671731523927. The reversal of 111671731523869 is 968325137176111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111671731523869 - 2⁵ = 111671731523837 is a prime.

It is a super-2 number, since 2×111671731523869² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111671731523669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6943887714 + ... + 6943903795.

It is an arithmetic number, because the mean of its divisors is an integer number (8249348156940).

Almost surely, 2^{111671731523869} is an apocalyptic number.

It is an amenable number.

111671731523869 is a deficient number, since it is larger than the sum of its proper divisors (20317838987171).

111671731523869 is a wasteful number, since it uses less digits than its factorization.

111671731523869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13887791580.

The product of its digits is 11430720, while the sum is 61.

The spelling of 111671731523869 in words is "one hundred eleven trillion, six hundred seventy-one billion, seven hundred thirty-one million, five hundred twenty-three thousand, eight hundred sixty-nine".