13239419661505 has 8 divisors (see below), whose sum is σ = 15929896903272. Its totient is φ = 10563140189568.

The previous prime is 13239419661421. The next prime is 13239419661521. The reversal of 13239419661505 is 50516691493231.

It can be written as a sum of positive squares in 4 ways, for example, as 143119969344 + 13096299692161 = 378312^2 + 3618881^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13239419661505 - 2²¹ = 13239417564353 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, 3549440404 + ... + 3549444133.

It is an arithmetic number, because the mean of its divisors is an integer number (1991237112909).

Almost surely, 2^{13239419661505} is an apocalyptic number.

It is an amenable number.

13239419661505 is a deficient number, since it is larger than the sum of its proper divisors (2690477241767).

13239419661505 is an equidigital number, since it uses as much as digits as its factorization.

13239419661505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7098884915.

The product of its (nonzero) digits is 5248800, while the sum is 55.

The spelling of 13239419661505 in words is "thirteen trillion, two hundred thirty-nine billion, four hundred nineteen million, six hundred sixty-one thousand, five hundred five".