11055551161 has 2 divisors, whose sum is σ = 11055551162. Its totient is φ = 11055551160.

The previous prime is 11055551131. The next prime is 11055551179. The reversal of 11055551161 is 16115555011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10665725625 + 389825536 = 103275^2 + 19744^2 .

It is an emirp because it is prime and its reverse (16115555011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11055551161 - 2¹⁵ = 11055518393 is a prime.

It is a super-2 number, since 2×11055551161² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11055551131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5527775580 + 5527775581.

It is an arithmetic number, because the mean of its divisors is an integer number (5527775581).

Almost surely, 2^11055551161 is an apocalyptic number.

It is an amenable number.

11055551161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11055551161 is an equidigital number, since it uses as much as digits as its factorization.

11055551161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3750, while the sum is 31.

The spelling of 11055551161 in words is "eleven billion, fifty-five million, five hundred fifty-one thousand, one hundred sixty-one".