11554516256161 has 32 divisors (see below), whose sum is σ = 12999304984320. Its totient is φ = 10212469960704.

The previous prime is 11554516256159. The next prime is 11554516256287. The reversal of 11554516256161 is 16165261545511.

It is a cyclic number.

It is not a de Polignac number, because 11554516256161 - 2¹ = 11554516256159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11554516254161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17508361 + ... + 18156313.

It is an arithmetic number, because the mean of its divisors is an integer number (406228280760).

Almost surely, 2^{11554516256161} is an apocalyptic number.

It is an amenable number.

11554516256161 is a deficient number, since it is larger than the sum of its proper divisors (1444788728159).

11554516256161 is a wasteful number, since it uses less digits than its factorization.

11554516256161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648825.

The product of its digits is 1080000, while the sum is 49.

The spelling of 11554516256161 in words is "eleven trillion, five hundred fifty-four billion, five hundred sixteen million, two hundred fifty-six thousand, one hundred sixty-one".