6540440177 has 2 divisors, whose sum is σ = 6540440178. Its totient is φ = 6540440176.

The previous prime is 6540440119. The next prime is 6540440189. The reversal of 6540440177 is 7710440456.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4012462336 + 2527977841 = 63344^2 + 50279^2 .

It is a cyclic number.

It is not a de Polignac number, because 6540440177 - 2¹² = 6540436081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6540440177.

It is not a weakly prime, because it can be changed into another prime (6540440117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3270220088 + 3270220089.

It is an arithmetic number, because the mean of its divisors is an integer number (3270220089).

Almost surely, 2^6540440177 is an apocalyptic number.

It is an amenable number.

6540440177 is a deficient number, since it is larger than the sum of its proper divisors (1).

6540440177 is an equidigital number, since it uses as much as digits as its factorization.

6540440177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 38.

The square root of 6540440177 is about 80872.9879316945. The cubic root of 6540440177 is about 1870.1179233975.

The spelling of 6540440177 in words is "six billion, five hundred forty million, four hundred forty thousand, one hundred seventy-seven".