6447041477 has 2 divisors, whose sum is σ = 6447041478. Its totient is φ = 6447041476.

The previous prime is 6447041453. The next prime is 6447041521. The reversal of 6447041477 is 7741407446.

It is an a-pointer prime, because the next prime (6447041521) can be obtained adding 6447041477 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5947340161 + 499701316 = 77119^2 + 22354^2 .

It is a cyclic number.

It is not a de Polignac number, because 6447041477 - 2³⁰ = 5373299653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6447041437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3223520738 + 3223520739.

It is an arithmetic number, because the mean of its divisors is an integer number (3223520739).

Almost surely, 2^6447041477 is an apocalyptic number.

It is an amenable number.

6447041477 is a deficient number, since it is larger than the sum of its proper divisors (1).

6447041477 is an equidigital number, since it uses as much as digits as its factorization.

6447041477 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 526848, while the sum is 44.

The square root of 6447041477 is about 80293.4709487639. The cubic root of 6447041477 is about 1861.1733334620.

The spelling of 6447041477 in words is "six billion, four hundred forty-seven million, forty-one thousand, four hundred seventy-seven".