111516161489 has 4 divisors (see below), whose sum is σ = 113888845824. Its totient is φ = 109143477156.

The previous prime is 111516161459. The next prime is 111516161501. The reversal of 111516161489 is 984161615111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111516161489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111516161459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1186342097 + ... + 1186342190.

It is an arithmetic number, because the mean of its divisors is an integer number (28472211456).

Almost surely, 2^111516161489 is an apocalyptic number.

It is an amenable number.

111516161489 is a deficient number, since it is larger than the sum of its proper divisors (2372684335).

111516161489 is an equidigital number, since it uses as much as digits as its factorization.

111516161489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372684334.

The product of its digits is 51840, while the sum is 44.

The spelling of 111516161489 in words is "one hundred eleven billion, five hundred sixteen million, one hundred sixty-one thousand, four hundred eighty-nine".