13261232320055 has 16 divisors (see below), whose sum is σ = 16962650121600. Its totient is φ = 9917914916352.

The previous prime is 13261232320043. The next prime is 13261232320073. The reversal of 13261232320055 is 55002323216231.

It is a cyclic number.

It is not a de Polignac number, because 13261232320055 - 2¹² = 13261232315959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13261232319997 and 13261232320024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 523525919 + ... + 523551248.

It is an arithmetic number, because the mean of its divisors is an integer number (1060165632600).

Almost surely, 2^{13261232320055} is an apocalyptic number.

13261232320055 is a deficient number, since it is larger than the sum of its proper divisors (3701417801545).

13261232320055 is a wasteful number, since it uses less digits than its factorization.

13261232320055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047077338.

The product of its (nonzero) digits is 64800, while the sum is 35.

Adding to 13261232320055 its reverse (55002323216231), we get a palindrome (68263555536286).

The spelling of 13261232320055 in words is "thirteen trillion, two hundred sixty-one billion, two hundred thirty-two million, three hundred twenty thousand, fifty-five".