11115502506161 has 8 divisors (see below), whose sum is σ = 11422601441640. Its totient is φ = 10808755147008.

The previous prime is 11115502506109. The next prime is 11115502506197. The reversal of 11115502506161 is 16160520551111.

It can be written as a sum of positive squares in 4 ways, for example, as 5254382555536 + 5861119950625 = 2292244^2 + 2420975^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11115502506161 - 2¹⁸ = 11115502244017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11115502502161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87829976 + ... + 87956441.

It is an arithmetic number, because the mean of its divisors is an integer number (1427825180205).

Almost surely, 2^{11115502506161} is an apocalyptic number.

It is an amenable number.

11115502506161 is a deficient number, since it is larger than the sum of its proper divisors (307098935479).

11115502506161 is a wasteful number, since it uses less digits than its factorization.

11115502506161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175788163.

The product of its (nonzero) digits is 9000, while the sum is 35.

The spelling of 11115502506161 in words is "eleven trillion, one hundred fifteen billion, five hundred two million, five hundred six thousand, one hundred sixty-one".