13020144565 has 8 divisors (see below), whose sum is σ = 15918969528. Its totient is φ = 10219584960.

The previous prime is 13020144509. The next prime is 13020144581. The reversal of 13020144565 is 56544102031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2473470756 + 10546673809 = 49734^2 + 102697^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-13020144565 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 24566046 + ... + 24566575.

It is an arithmetic number, because the mean of its divisors is an integer number (1989871191).

Almost surely, 2^13020144565 is an apocalyptic number.

It is an amenable number.

13020144565 is a deficient number, since it is larger than the sum of its proper divisors (2898824963).

13020144565 is an equidigital number, since it uses as much as digits as its factorization.

13020144565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49132679.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 13020144565 its reverse (56544102031), we get a palindrome (69564246596).

The spelling of 13020144565 in words is "thirteen billion, twenty million, one hundred forty-four thousand, five hundred sixty-five".