111881649481 has 8 divisors (see below), whose sum is σ = 130474227200. Its totient is φ = 95898556404.

The previous prime is 111881649457. The next prime is 111881649487. The reversal of 111881649481 is 184946188111.

It is not a de Polignac number, because 111881649481 - 2⁹ = 111881648969 is a prime.

It is a super-2 number, since 2×111881649481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111881649487) 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, 163092441 + ... + 163093126.

It is an arithmetic number, because the mean of its divisors is an integer number (16309278400).

Almost surely, 2^111881649481 is an apocalyptic number.

It is an amenable number.

111881649481 is a deficient number, since it is larger than the sum of its proper divisors (18592577719).

111881649481 is an frugal number, since it uses more digits than its factorization.

111881649481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326185588 (or 326185574 counting only the distinct ones).

The product of its digits is 442368, while the sum is 52.

The spelling of 111881649481 in words is "one hundred eleven billion, eight hundred eighty-one million, six hundred forty-nine thousand, four hundred eighty-one".