6545134477 has 18 divisors (see below), whose sum is σ = 7654448718. Its totient is φ = 5580268848.

The previous prime is 6545134471. The next prime is 6545134553. The reversal of 6545134477 is 7744315456.

It can be written as a sum of positive squares in only one way, i.e., 6527670436 + 17464041 = 80794^2 + 4179^2 .

It is not a de Polignac number, because 6545134477 - 2³ = 6545134469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6545134471) 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 in 17 ways as a sum of consecutive naturals, for example, 1938763 + ... + 1942135.

It is an arithmetic number, because the mean of its divisors is an integer number (425247151).

Almost surely, 2^6545134477 is an apocalyptic number.

It is an amenable number.

6545134477 is a deficient number, since it is larger than the sum of its proper divisors (1109314241).

6545134477 is an equidigital number, since it uses as much as digits as its factorization.

6545134477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785 (or 3579 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 46.

The square root of 6545134477 is about 80902.0053954165. The cubic root of 6545134477 is about 1870.5652324910.

The spelling of 6545134477 in words is "six billion, five hundred forty-five million, one hundred thirty-four thousand, four hundred seventy-seven".