11516155644661 has 16 divisors (see below), whose sum is σ = 11627885281536. Its totient is φ = 11404855478016.

The previous prime is 11516155644577. The next prime is 11516155644671. The reversal of 11516155644661 is 16644655161511.

It is a cyclic number.

It is not a de Polignac number, because 11516155644661 - 2¹⁵ = 11516155611893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11516155644599 and 11516155644608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11516155644671) 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, 112118650 + ... + 112221316.

It is an arithmetic number, because the mean of its divisors is an integer number (726742830096).

Almost surely, 2^{11516155644661} is an apocalyptic number.

It is an amenable number.

11516155644661 is a deficient number, since it is larger than the sum of its proper divisors (111729636875).

11516155644661 is a wasteful number, since it uses less digits than its factorization.

11516155644661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104748.

The product of its digits is 2592000, while the sum is 52.

The spelling of 11516155644661 in words is "eleven trillion, five hundred sixteen billion, one hundred fifty-five million, six hundred forty-four thousand, six hundred sixty-one".