18556160841 has 27 divisors (see below), whose sum is σ = 28483419783. Its totient is φ = 11638722240.

The previous prime is 18556160827. The next prime is 18556160911. The reversal of 18556160841 is 14806165581.

The square root of 18556160841 is 136221.

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

18556160841 is a `hidden beast` number, since 1 + 8 + 5 + 561 + 6 + 0 + 84 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14446838025 + 4109322816 = 120195^2 + 64104^2 .

It is not a de Polignac number, because 18556160841 - 2¹¹ = 18556158793 is a prime.

It is a super-2 number, since 2×18556160841² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18556160941) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6945936 + ... + 6948606.

Almost surely, 2^18556160841 is an apocalyptic number.

18556160841 is the 136221-st square number.

18556160841 is the 68111-st centered octagonal number.

It is an amenable number.

18556160841 is a deficient number, since it is larger than the sum of its proper divisors (9927258942).

18556160841 is an frugal number, since it uses more digits than its factorization.

18556160841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5382 (or 2691 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

The spelling of 18556160841 in words is "eighteen billion, five hundred fifty-six million, one hundred sixty thousand, eight hundred forty-one".