13441165561 has 4 divisors (see below), whose sum is σ = 13630477824. Its totient is φ = 13251853300.

The previous prime is 13441165519. The next prime is 13441165603. The reversal of 13441165561 is 16556114431.

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 an interprime number because it is at equal distance from previous prime (13441165519) and next prime (13441165603).

It is a cyclic number.

It is not a de Polignac number, because 13441165561 - 2⁷ = 13441165433 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 13441165561.

It is not an unprimeable number, because it can be changed into a prime (13441165961) 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, 94656025 + ... + 94656166.

It is an arithmetic number, because the mean of its divisors is an integer number (3407619456).

Almost surely, 2^13441165561 is an apocalyptic number.

It is an amenable number.

13441165561 is a deficient number, since it is larger than the sum of its proper divisors (189312263).

13441165561 is an equidigital number, since it uses as much as digits as its factorization.

13441165561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189312262.

The product of its digits is 43200, while the sum is 37.

Adding to 13441165561 its reverse (16556114431), we get a palindrome (29997279992).

The spelling of 13441165561 in words is "thirteen billion, four hundred forty-one million, one hundred sixty-five thousand, five hundred sixty-one".