6464144177 has 2 divisors, whose sum is σ = 6464144178. Its totient is φ = 6464144176.

The previous prime is 6464144131. The next prime is 6464144179. The reversal of 6464144177 is 7714414646.

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., 6438297121 + 25847056 = 80239^2 + 5084^2 .

It is a cyclic number.

It is not a de Polignac number, because 6464144177 - 2²⁰ = 6463095601 is a prime.

Together with 6464144179, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6464144179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3232072088 + 3232072089.

It is an arithmetic number, because the mean of its divisors is an integer number (3232072089).

Almost surely, 2^6464144177 is an apocalyptic number.

It is an amenable number.

6464144177 is a deficient number, since it is larger than the sum of its proper divisors (1).

6464144177 is an equidigital number, since it uses as much as digits as its factorization.

6464144177 is an evil number, because the sum of its binary digits is even.

The product of its digits is 451584, while the sum is 44.

The square root of 6464144177 is about 80399.9015981985. The cubic root of 6464144177 is about 1862.8176527228.

The spelling of 6464144177 in words is "six billion, four hundred sixty-four million, one hundred forty-four thousand, one hundred seventy-seven".