13445420565 has 32 divisors (see below), whose sum is σ = 22129687296. Its totient is φ = 6965844480.

The previous prime is 13445420561. The next prime is 13445420603. The reversal of 13445420565 is 56502454431.

It is not a de Polignac number, because 13445420565 - 2² = 13445420561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13445420561) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 331009 + ... + 369401.

It is an arithmetic number, because the mean of its divisors is an integer number (691552728).

Almost surely, 2^13445420565 is an apocalyptic number.

13445420565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13445420565 is a deficient number, since it is larger than the sum of its proper divisors (8684266731).

13445420565 is a wasteful number, since it uses less digits than its factorization.

13445420565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39069.

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 13445420565 its reverse (56502454431), we get a palindrome (69947874996).

The spelling of 13445420565 in words is "thirteen billion, four hundred forty-five million, four hundred twenty thousand, five hundred sixty-five".