13403318368555 has 32 divisors (see below), whose sum is σ = 16587151902720. Its totient is φ = 10392117820800.

The previous prime is 13403318368543. The next prime is 13403318368603. The reversal of 13403318368555 is 55586381330431.

It is a happy number.

It is not a de Polignac number, because 13403318368555 - 2²⁵ = 13403284814123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13403318368496 and 13403318368505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10652976 + ... + 11844514.

It is an arithmetic number, because the mean of its divisors is an integer number (518348496960).

Almost surely, 2^{13403318368555} is an apocalyptic number.

13403318368555 is a deficient number, since it is larger than the sum of its proper divisors (3183833534165).

13403318368555 is a wasteful number, since it uses less digits than its factorization.

13403318368555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192059.

The product of its (nonzero) digits is 15552000, while the sum is 55.

Adding to 13403318368555 its reverse (55586381330431), we get a palindrome (68989699698986).

The spelling of 13403318368555 in words is "thirteen trillion, four hundred three billion, three hundred eighteen million, three hundred sixty-eight thousand, five hundred fifty-five".