111678455689 has 2 divisors, whose sum is σ = 111678455690. Its totient is φ = 111678455688.

The previous prime is 111678455677. The next prime is 111678455753. The reversal of 111678455689 is 986554876111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81841766400 + 29836689289 = 286080^2 + 172733^2 .

It is a cyclic number.

It is not a de Polignac number, because 111678455689 - 2¹¹ = 111678453641 is a prime.

It is not a weakly prime, because it can be changed into another prime (111678455639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55839227844 + 55839227845.

It is an arithmetic number, because the mean of its divisors is an integer number (55839227845).

Almost surely, 2^111678455689 is an apocalyptic number.

It is an amenable number.

111678455689 is a deficient number, since it is larger than the sum of its proper divisors (1).

111678455689 is an equidigital number, since it uses as much as digits as its factorization.

111678455689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14515200, while the sum is 61.

The spelling of 111678455689 in words is "one hundred eleven billion, six hundred seventy-eight million, four hundred fifty-five thousand, six hundred eighty-nine".