115738081209 has 27 divisors (see below), whose sum is σ = 168516082917. Its totient is φ = 76545675000.

The previous prime is 115738081177. The next prime is 115738081219. The reversal of 115738081209 is 902180837511.

The square root of 115738081209 is 340203.

It is a perfect power (a square), and thus also a powerful number.

115738081209 is a `hidden beast` number, since 11 + 57 + 380 + 8 + 1 + 209 = 666.

It is not a de Polignac number, because 115738081209 - 2⁵ = 115738081177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115738081219) 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 in 26 ways as a sum of consecutive naturals, for example, 154111584 + ... + 154112334.

Almost surely, 2^115738081209 is an apocalyptic number.

115738081209 is the 340203-rd square number.

115738081209 is the 170102-nd centered octagonal number.

It is an amenable number.

115738081209 is a deficient number, since it is larger than the sum of its proper divisors (52778001708).

115738081209 is an frugal number, since it uses more digits than its factorization.

115738081209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1810 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The spelling of 115738081209 in words is "one hundred fifteen billion, seven hundred thirty-eight million, eighty-one thousand, two hundred nine".