54188481181 has 2 divisors, whose sum is σ = 54188481182. Its totient is φ = 54188481180.

The previous prime is 54188481173. The next prime is 54188481187. The reversal of 54188481181 is 18118488145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50741617081 + 3446864100 = 225259^2 + 58710^2 .

It is a cyclic number.

It is not a de Polignac number, because 54188481181 - 2³ = 54188481173 is a prime.

It is a super-2 number, since 2×54188481181² (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 (54188481187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27094240590 + 27094240591.

It is an arithmetic number, because the mean of its divisors is an integer number (27094240591).

Almost surely, 2^54188481181 is an apocalyptic number.

It is an amenable number.

54188481181 is a deficient number, since it is larger than the sum of its proper divisors (1).

54188481181 is an equidigital number, since it uses as much as digits as its factorization.

54188481181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 327680, while the sum is 49.

The spelling of 54188481181 in words is "fifty-four billion, one hundred eighty-eight million, four hundred eighty-one thousand, one hundred eighty-one".