6771129447 has 4 divisors (see below), whose sum is σ = 9028172600. Its totient is φ = 4514086296.

The previous prime is 6771129439. The next prime is 6771129457. The reversal of 6771129447 is 7449211776.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6771129447 - 2³ = 6771129439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6771129396 and 6771129405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6771129437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1128521572 + ... + 1128521577.

It is an arithmetic number, because the mean of its divisors is an integer number (2257043150).

Almost surely, 2^6771129447 is an apocalyptic number.

6771129447 is a deficient number, since it is larger than the sum of its proper divisors (2257043153).

6771129447 is a wasteful number, since it uses less digits than its factorization.

6771129447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257043152.

The product of its digits is 592704, while the sum is 48.

The square root of 6771129447 is about 82286.8728716798. The cubic root of 6771129447 is about 1891.8514789656.

The spelling of 6771129447 in words is "six billion, seven hundred seventy-one million, one hundred twenty-nine thousand, four hundred forty-seven".