13145223665 has 8 divisors (see below), whose sum is σ = 18027735360. Its totient is φ = 9013867632.

The previous prime is 13145223653. The next prime is 13145223703. The reversal of 13145223665 is 56632254131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13145223665 - 2¹⁴ = 13145207281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187788875 + ... + 187788944.

It is an arithmetic number, because the mean of its divisors is an integer number (2253466920).

Almost surely, 2^13145223665 is an apocalyptic number.

It is an amenable number.

13145223665 is a deficient number, since it is larger than the sum of its proper divisors (4882511695).

13145223665 is an equidigital number, since it uses as much as digits as its factorization.

13145223665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375577831.

The product of its digits is 129600, while the sum is 38.

Adding to 13145223665 its reverse (56632254131), we get a palindrome (69777477796).

The spelling of 13145223665 in words is "thirteen billion, one hundred forty-five million, two hundred twenty-three thousand, six hundred sixty-five".