6544471057 has 2 divisors, whose sum is σ = 6544471058. Its totient is φ = 6544471056.

The previous prime is 6544471019. The next prime is 6544471061. The reversal of 6544471057 is 7501744456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4490206081 + 2054264976 = 67009^2 + 45324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6544471057 is a prime.

It is not a weakly prime, because it can be changed into another prime (6544471007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3272235528 + 3272235529.

It is an arithmetic number, because the mean of its divisors is an integer number (3272235529).

Almost surely, 2^6544471057 is an apocalyptic number.

It is an amenable number.

6544471057 is a deficient number, since it is larger than the sum of its proper divisors (1).

6544471057 is an equidigital number, since it uses as much as digits as its factorization.

6544471057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 470400, while the sum is 43.

The square root of 6544471057 is about 80897.9051459307. The cubic root of 6544471057 is about 1870.5020296990.

The spelling of 6544471057 in words is "six billion, five hundred forty-four million, four hundred seventy-one thousand, fifty-seven".