111194904681 has 135 divisors (see below), whose sum is σ = 198666684909. Its totient is φ = 61799289552.

The previous prime is 111194904661. The next prime is 111194904683. The reversal of 111194904681 is 186409491111.

The square root of 111194904681 is 333459.

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

111194904681 is a `hidden beast` number, since 1 + 1 + 11 + 94 + 90 + 468 + 1 = 666.

It is not a de Polignac number, because 111194904681 - 2⁵ = 111194904649 is a prime.

It is a super-2 number, since 2×111194904681² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111194904683) by changing a digit.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 1407530400 + ... + 1407530478.

Almost surely, 2^111194904681 is an apocalyptic number.

111194904681 is the 333459-th square number.

111194904681 is the 166730-th centered octagonal number.

It is an amenable number.

111194904681 is a deficient number, since it is larger than the sum of its proper divisors (87471780228).

111194904681 is an frugal number, since it uses more digits than its factorization.

111194904681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 45.

The spelling of 111194904681 in words is "one hundred eleven billion, one hundred ninety-four million, nine hundred four thousand, six hundred eighty-one".