111616051161 has 4 divisors (see below), whose sum is σ = 148821401552. Its totient is φ = 74410700772.

The previous prime is 111616051123. The next prime is 111616051187. The reversal of 111616051161 is 161150616111.

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 not a de Polignac number, because 111616051161 - 2⁶ = 111616051097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111616053161) 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, 18602675191 + ... + 18602675196.

It is an arithmetic number, because the mean of its divisors is an integer number (37205350388).

Almost surely, 2^111616051161 is an apocalyptic number.

It is an amenable number.

111616051161 is a deficient number, since it is larger than the sum of its proper divisors (37205350391).

111616051161 is an equidigital number, since it uses as much as digits as its factorization.

111616051161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37205350390.

The product of its (nonzero) digits is 1080, while the sum is 30.

Adding to 111616051161 its reverse (161150616111), we get a palindrome (272766667272).

The spelling of 111616051161 in words is "one hundred eleven billion, six hundred sixteen million, fifty-one thousand, one hundred sixty-one".