111880988819161 has 9 divisors (see below), whose sum is σ = 111951023153781. Its totient is φ = 111810998289084.

The previous prime is 111880988819153. The next prime is 111880988819177. The reversal of 111880988819161 is 161918889088111.

The square root of 111880988819161 is 10577381.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 111880988819161 - 2³ = 111880988819153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111880988819141) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 28548349360 + ... + 28548353278.

Almost surely, 2^{111880988819161} is an apocalyptic number.

111880988819161 is the 10577381-st square number.

111880988819161 is the 5288691-st centered octagonal number.

It is an amenable number.

111880988819161 is a deficient number, since it is larger than the sum of its proper divisors (70034334620).

111880988819161 is an frugal number, since it uses more digits than its factorization.

111880988819161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13236 (or 6618 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 70.

The spelling of 111880988819161 in words is "one hundred eleven trillion, eight hundred eighty billion, nine hundred eighty-eight million, eight hundred nineteen thousand, one hundred sixty-one".