2643415449 has 4 divisors (see below), whose sum is σ = 3524553936. Its totient is φ = 1762276964.

The previous prime is 2643415447. The next prime is 2643415487. The reversal of 2643415449 is 9445143462.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2643415449 - 2¹ = 2643415447 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2643415449.

It is not an unprimeable number, because it can be changed into a prime (2643415447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440569239 + ... + 440569244.

It is an arithmetic number, because the mean of its divisors is an integer number (881138484).

Almost surely, 2^2643415449 is an apocalyptic number.

It is an amenable number.

2643415449 is a deficient number, since it is larger than the sum of its proper divisors (881138487).

2643415449 is an equidigital number, since it uses as much as digits as its factorization.

2643415449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881138486.

The product of its digits is 414720, while the sum is 42.

The square root of 2643415449 is about 51414.1561148289. The cubic root of 2643415449 is about 1382.6804042629.

The spelling of 2643415449 in words is "two billion, six hundred forty-three million, four hundred fifteen thousand, four hundred forty-nine".