6543677449 has 9 divisors (see below), whose sum is σ = 6710573269. Its totient is φ = 6380839840.

The previous prime is 6543677443. The next prime is 6543677467. The reversal of 6543677449 is 9447763456.

The square root of 6543677449 is 80893.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 3805039225 + 2738638224 = 61685^2 + 52332^2 .

It is not a de Polignac number, because 6543677449 - 2¹¹ = 6543675401 is a prime.

It is a super-2 number, since 2×6543677449² = 85639429113102295202, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6543677449.

It is not an unprimeable number, because it can be changed into a prime (6543677443) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3315627 + ... + 3317599.

Almost surely, 2^6543677449 is an apocalyptic number.

6543677449 is the 80893-rd square number.

6543677449 is the 40447-th centered octagonal number.

It is an amenable number.

6543677449 is a deficient number, since it is larger than the sum of its proper divisors (166895820).

6543677449 is an frugal number, since it uses more digits than its factorization.

6543677449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028 (or 2014 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 55.

The cubic root of 6543677449 is about 1870.4264185270.

The spelling of 6543677449 in words is "six billion, five hundred forty-three million, six hundred seventy-seven thousand, four hundred forty-nine".