111691349741 has 2 divisors, whose sum is σ = 111691349742. Its totient is φ = 111691349740.

The previous prime is 111691349719. The next prime is 111691349761. The reversal of 111691349741 is 147943196111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60739574116 + 50951775625 = 246454^2 + 225725^2 .

It is a cyclic number.

It is not a de Polignac number, because 111691349741 - 2⁶ = 111691349677 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111691349711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55845674870 + 55845674871.

It is an arithmetic number, because the mean of its divisors is an integer number (55845674871).

Almost surely, 2^111691349741 is an apocalyptic number.

It is an amenable number.

111691349741 is a deficient number, since it is larger than the sum of its proper divisors (1).

111691349741 is an equidigital number, since it uses as much as digits as its factorization.

111691349741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 47.

The spelling of 111691349741 in words is "one hundred eleven billion, six hundred ninety-one million, three hundred forty-nine thousand, seven hundred forty-one".