111687318919 has 8 divisors (see below), whose sum is σ = 125133704208. Its totient is φ = 98789765760.

The previous prime is 111687318881. The next prime is 111687318943. The reversal of 111687318919 is 919813786111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111687318919 is a prime.

It is a super-2 number, since 2×111687318919² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111687318919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111687318979) 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, 137207602 + ... + 137208415.

It is an arithmetic number, because the mean of its divisors is an integer number (15641713026).

Almost surely, 2^111687318919 is an apocalyptic number.

111687318919 is a deficient number, since it is larger than the sum of its proper divisors (13446385289).

111687318919 is a wasteful number, since it uses less digits than its factorization.

111687318919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274416065.

The product of its digits is 653184, while the sum is 55.

The spelling of 111687318919 in words is "one hundred eleven billion, six hundred eighty-seven million, three hundred eighteen thousand, nine hundred nineteen".