111129581639 has 2 divisors, whose sum is σ = 111129581640. Its totient is φ = 111129581638.

The previous prime is 111129581617. The next prime is 111129581653. The reversal of 111129581639 is 936185921111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111129581639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111129581593 and 111129581602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111129581939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55564790819 + 55564790820.

It is an arithmetic number, because the mean of its divisors is an integer number (55564790820).

Almost surely, 2^111129581639 is an apocalyptic number.

111129581639 is a deficient number, since it is larger than the sum of its proper divisors (1).

111129581639 is an equidigital number, since it uses as much as digits as its factorization.

111129581639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 47.

The spelling of 111129581639 in words is "one hundred eleven billion, one hundred twenty-nine million, five hundred eighty-one thousand, six hundred thirty-nine".