115516601209 has 2 divisors, whose sum is σ = 115516601210. Its totient is φ = 115516601208.

The previous prime is 115516601159. The next prime is 115516601227. The reversal of 115516601209 is 902106615511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113469943609 + 2046657600 = 336853^2 + 45240^2 .

It is a cyclic number.

It is not a de Polignac number, because 115516601209 - 2¹⁵ = 115516568441 is a prime.

It is not a weakly prime, because it can be changed into another prime (115516661209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57758300604 + 57758300605.

It is an arithmetic number, because the mean of its divisors is an integer number (57758300605).

Almost surely, 2^115516601209 is an apocalyptic number.

It is an amenable number.

115516601209 is a deficient number, since it is larger than the sum of its proper divisors (1).

115516601209 is an equidigital number, since it uses as much as digits as its factorization.

115516601209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 37.

The spelling of 115516601209 in words is "one hundred fifteen billion, five hundred sixteen million, six hundred one thousand, two hundred nine".