55005511181 has 2 divisors, whose sum is σ = 55005511182. Its totient is φ = 55005511180.

The previous prime is 55005511123. The next prime is 55005511201. The reversal of 55005511181 is 18111550055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55004320900 + 1190281 = 234530^2 + 1091^2 .

It is a cyclic number.

It is not a de Polignac number, because 55005511181 - 2²⁶ = 54938402317 is a prime.

It is a super-2 number, since 2×55005511181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55005510181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27502755590 + 27502755591.

It is an arithmetic number, because the mean of its divisors is an integer number (27502755591).

Almost surely, 2^55005511181 is an apocalyptic number.

It is an amenable number.

55005511181 is a deficient number, since it is larger than the sum of its proper divisors (1).

55005511181 is an equidigital number, since it uses as much as digits as its factorization.

55005511181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5000, while the sum is 32.

The spelling of 55005511181 in words is "fifty-five billion, five million, five hundred eleven thousand, one hundred eighty-one".