13124445505 has 8 divisors (see below), whose sum is σ = 15905269224. Its totient is φ = 10395600000.

The previous prime is 13124445497. The next prime is 13124445533. The reversal of 13124445505 is 50554442131.

It can be written as a sum of positive squares in 4 ways, for example, as 2381537601 + 10742907904 = 48801^2 + 103648^2 .

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

It is not a de Polignac number, because 13124445505 - 2³ = 13124445497 is a prime.

It is a Duffinian 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, 12993996 + ... + 12995005.

It is an arithmetic number, because the mean of its divisors is an integer number (1988158653).

Almost surely, 2^13124445505 is an apocalyptic number.

It is an amenable number.

13124445505 is a deficient number, since it is larger than the sum of its proper divisors (2780823719).

13124445505 is a wasteful number, since it uses less digits than its factorization.

13124445505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25989107.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 13124445505 its reverse (50554442131), we get a palindrome (63678887636).

The spelling of 13124445505 in words is "thirteen billion, one hundred twenty-four million, four hundred forty-five thousand, five hundred five".