115666061555009 has 16 divisors (see below), whose sum is σ = 135763124217600. Its totient is φ = 96462359158464.

The previous prime is 115666061554949. The next prime is 115666061555159. The reversal of 115666061555009 is 900555160666511.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115666061555009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115666061545009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60714047 + ... + 62590155.

It is an arithmetic number, because the mean of its divisors is an integer number (8485195263600).

Almost surely, 2^{115666061555009} is an apocalyptic number.

It is an amenable number.

115666061555009 is a deficient number, since it is larger than the sum of its proper divisors (20097062662591).

115666061555009 is a wasteful number, since it uses less digits than its factorization.

115666061555009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2114192.

The product of its (nonzero) digits is 7290000, while the sum is 56.

The spelling of 115666061555009 in words is "one hundred fifteen trillion, six hundred sixty-six billion, sixty-one million, five hundred fifty-five thousand, nine".