111688765687 has 2 divisors, whose sum is σ = 111688765688. Its totient is φ = 111688765686.

The previous prime is 111688765649. The next prime is 111688765703. The reversal of 111688765687 is 786567886111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111688765687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111688765087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55844382843 + 55844382844.

It is an arithmetic number, because the mean of its divisors is an integer number (55844382844).

Almost surely, 2^111688765687 is an apocalyptic number.

111688765687 is a deficient number, since it is larger than the sum of its proper divisors (1).

111688765687 is an equidigital number, since it uses as much as digits as its factorization.

111688765687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27095040, while the sum is 64.

The spelling of 111688765687 in words is "one hundred eleven billion, six hundred eighty-eight million, seven hundred sixty-five thousand, six hundred eighty-seven".