13261744361 has 4 divisors (see below), whose sum is σ = 13459680912. Its totient is φ = 13063807812.

The previous prime is 13261744273. The next prime is 13261744369. The reversal of 13261744361 is 16344716231.

13261744361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 16344716231 = 127 ⋅128698553.

It is a cyclic number.

It is not a de Polignac number, because 13261744361 - 2²² = 13257550057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13261744369) 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, 98968175 + ... + 98968308.

It is an arithmetic number, because the mean of its divisors is an integer number (3364920228).

Almost surely, 2^13261744361 is an apocalyptic number.

It is an amenable number.

13261744361 is a deficient number, since it is larger than the sum of its proper divisors (197936551).

13261744361 is an equidigital number, since it uses as much as digits as its factorization.

13261744361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197936550.

The product of its digits is 72576, while the sum is 38.

The spelling of 13261744361 in words is "thirteen billion, two hundred sixty-one million, seven hundred forty-four thousand, three hundred sixty-one".