111998191914 has 48 divisors (see below), whose sum is σ = 289519142400. Its totient is φ = 31999482648.

The previous prime is 111998191909. The next prime is 111998191967. The reversal of 111998191914 is 419191899111.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21161034 + ... + 21166325.

It is an arithmetic number, because the mean of its divisors is an integer number (6031648800).

Almost surely, 2^111998191914 is an apocalyptic number.

111998191914 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

111998191914 is an abundant number, since it is smaller than the sum of its proper divisors (177520950486).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111998191914 is a wasteful number, since it uses less digits than its factorization.

111998191914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42327384 (or 42327371 counting only the distinct ones).

The product of its digits is 209952, while the sum is 54.

The spelling of 111998191914 in words is "one hundred eleven billion, nine hundred ninety-eight million, one hundred ninety-one thousand, nine hundred fourteen".