13043640361 has 4 divisors (see below), whose sum is σ = 13321164672. Its totient is φ = 12766116052.

The previous prime is 13043640347. The next prime is 13043640457. The reversal of 13043640361 is 16304634031.

It is a happy number.

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 13043640361 - 2¹¹ = 13043638313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13043640061) 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, 138762085 + ... + 138762178.

It is an arithmetic number, because the mean of its divisors is an integer number (3330291168).

Almost surely, 2^13043640361 is an apocalyptic number.

It is an amenable number.

13043640361 is a deficient number, since it is larger than the sum of its proper divisors (277524311).

13043640361 is an equidigital number, since it uses as much as digits as its factorization.

13043640361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277524310.

The product of its (nonzero) digits is 15552, while the sum is 31.

The spelling of 13043640361 in words is "thirteen billion, forty-three million, six hundred forty thousand, three hundred sixty-one".