111187755671 has 2 divisors, whose sum is σ = 111187755672. Its totient is φ = 111187755670.

The previous prime is 111187755643. The next prime is 111187755683. The reversal of 111187755671 is 176557781111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111187755671 is a prime.

It is a super-2 number, since 2×111187755671² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111187755611) 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, 55593877835 + 55593877836.

It is an arithmetic number, because the mean of its divisors is an integer number (55593877836).

Almost surely, 2^111187755671 is an apocalyptic number.

111187755671 is a deficient number, since it is larger than the sum of its proper divisors (1).

111187755671 is an equidigital number, since it uses as much as digits as its factorization.

111187755671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 411600, while the sum is 50.

The spelling of 111187755671 in words is "one hundred eleven billion, one hundred eighty-seven million, seven hundred fifty-five thousand, six hundred seventy-one".