13126345555 has 4 divisors (see below), whose sum is σ = 15751614672. Its totient is φ = 10501076440.

The previous prime is 13126345549. The next prime is 13126345577. The reversal of 13126345555 is 55554362131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13126345555 - 2¹³ = 13126337363 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1312634551 + ... + 1312634560.

It is an arithmetic number, because the mean of its divisors is an integer number (3937903668).

Almost surely, 2^13126345555 is an apocalyptic number.

13126345555 is a deficient number, since it is larger than the sum of its proper divisors (2625269117).

13126345555 is an equidigital number, since it uses as much as digits as its factorization.

13126345555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625269116.

The product of its digits is 270000, while the sum is 40.

The spelling of 13126345555 in words is "thirteen billion, one hundred twenty-six million, three hundred forty-five thousand, five hundred fifty-five".