540664181 has 2 divisors, whose sum is σ = 540664182. Its totient is φ = 540664180.

The previous prime is 540664153. The next prime is 540664199. The reversal of 540664181 is 181466045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 509404900 + 31259281 = 22570^2 + 5591^2 .

It is a cyclic number.

It is not a de Polignac number, because 540664181 - 2²² = 536469877 is a prime.

It is a super-2 number, since 2×540664181² = 584635513232801522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540664121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270332090 + 270332091.

It is an arithmetic number, because the mean of its divisors is an integer number (270332091).

Almost surely, 2^540664181 is an apocalyptic number.

It is an amenable number.

540664181 is a deficient number, since it is larger than the sum of its proper divisors (1).

540664181 is an equidigital number, since it uses as much as digits as its factorization.

540664181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 540664181 is about 23252.1865853515. The cubic root of 540664181 is about 814.6590120078.

The spelling of 540664181 in words is "five hundred forty million, six hundred sixty-four thousand, one hundred eighty-one".