13343397649 has 4 divisors (see below), whose sum is σ = 13417118260. Its totient is φ = 13269677040.

The previous prime is 13343397647. The next prime is 13343397679. The reversal of 13343397649 is 94679334331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2170907649 + 11172490000 = 46593^2 + 105700^2 .

It is a cyclic number.

It is not a de Polignac number, because 13343397649 - 2¹ = 13343397647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13343397596 and 13343397605.

It is not an unprimeable number, because it can be changed into a prime (13343397647) 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, 36860034 + ... + 36860395.

It is an arithmetic number, because the mean of its divisors is an integer number (3354279565).

Almost surely, 2^13343397649 is an apocalyptic number.

It is an amenable number.

13343397649 is a deficient number, since it is larger than the sum of its proper divisors (73720611).

13343397649 is an equidigital number, since it uses as much as digits as its factorization.

13343397649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73720610.

The product of its digits is 4408992, while the sum is 52.

The spelling of 13343397649 in words is "thirteen billion, three hundred forty-three million, three hundred ninety-seven thousand, six hundred forty-nine".