115668281389 has 2 divisors, whose sum is σ = 115668281390. Its totient is φ = 115668281388.

The previous prime is 115668281357. The next prime is 115668281411. The reversal of 115668281389 is 983182866511.

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., 111055562500 + 4612718889 = 333250^2 + 67917^2 .

It is a cyclic number.

It is not a de Polignac number, because 115668281389 - 2⁵ = 115668281357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115668281329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57834140694 + 57834140695.

It is an arithmetic number, because the mean of its divisors is an integer number (57834140695).

Almost surely, 2^115668281389 is an apocalyptic number.

It is an amenable number.

115668281389 is a deficient number, since it is larger than the sum of its proper divisors (1).

115668281389 is an equidigital number, since it uses as much as digits as its factorization.

115668281389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 58.

The spelling of 115668281389 in words is "one hundred fifteen billion, six hundred sixty-eight million, two hundred eighty-one thousand, three hundred eighty-nine".