6449736379447 has 4 divisors (see below), whose sum is σ = 6540577736976. Its totient is φ = 6358895021920.

The previous prime is 6449736379399. The next prime is 6449736379451. The reversal of 6449736379447 is 7449736379446.

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

It is a cyclic number.

It is not a de Polignac number, because 6449736379447 - 2¹⁹ = 6449735855159 is a prime.

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 6449736379447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6449736379477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45420678658 + ... + 45420678799.

It is an arithmetic number, because the mean of its divisors is an integer number (1635144434244).

Almost surely, 2^{6449736379447} is an apocalyptic number.

6449736379447 is a deficient number, since it is larger than the sum of its proper divisors (90841357529).

6449736379447 is an equidigital number, since it uses as much as digits as its factorization.

6449736379447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90841357528.

The product of its digits is 2304433152, while the sum is 73.

Subtracting 6449736379447 from its reverse (7449736379446), we obtain a palindrome (999999999999).

The spelling of 6449736379447 in words is "six trillion, four hundred forty-nine billion, seven hundred thirty-six million, three hundred seventy-nine thousand, four hundred forty-seven".