111986509856869 has 8 divisors (see below), whose sum is σ = 115599720775680. Its totient is φ = 108373345366800.

The previous prime is 111986509856827. The next prime is 111986509856917. The reversal of 111986509856869 is 968658905689111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111986509856869 - 2⁹ = 111986509856357 is a prime.

It is a super-2 number, since 2×111986509856869² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111986509856792 and 111986509856801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111986509856069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6672034 + ... + 16385635.

It is an arithmetic number, because the mean of its divisors is an integer number (14449965096960).

Almost surely, 2^{111986509856869} is an apocalyptic number.

It is an amenable number.

111986509856869 is a deficient number, since it is larger than the sum of its proper divisors (3613210918811).

111986509856869 is a wasteful number, since it uses less digits than its factorization.

111986509856869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23214371.

The product of its (nonzero) digits is 2015539200, while the sum is 82.

The spelling of 111986509856869 in words is "one hundred eleven trillion, nine hundred eighty-six billion, five hundred nine million, eight hundred fifty-six thousand, eight hundred sixty-nine".