13505450531555 has 4 divisors (see below), whose sum is σ = 16206540637872. Its totient is φ = 10804360425240.

The previous prime is 13505450531509. The next prime is 13505450531561. The reversal of 13505450531555 is 55513505450531.

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

It is not a de Polignac number, because 13505450531555 - 2⁶ = 13505450531491 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350545053151 + ... + 1350545053160.

It is an arithmetic number, because the mean of its divisors is an integer number (4051635159468).

Almost surely, 2^{13505450531555} is an apocalyptic number.

13505450531555 is a deficient number, since it is larger than the sum of its proper divisors (2701090106317).

13505450531555 is an equidigital number, since it uses as much as digits as its factorization.

13505450531555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701090106316.

The product of its (nonzero) digits is 2812500, while the sum is 47.

The spelling of 13505450531555 in words is "thirteen trillion, five hundred five billion, four hundred fifty million, five hundred thirty-one thousand, five hundred fifty-five".