13556445258173 has 4 divisors (see below), whose sum is σ = 13556497821888. Its totient is φ = 13556392694460.

The previous prime is 13556445258127. The next prime is 13556445258229. The reversal of 13556445258173 is 37185254465531.

13556445258173 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13556445258173 - 2¹⁶ = 13556445192637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13556445258373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25893083 + ... + 26411448.

It is an arithmetic number, because the mean of its divisors is an integer number (3389124455472).

Almost surely, 2^{13556445258173} is an apocalyptic number.

It is an amenable number.

13556445258173 is a deficient number, since it is larger than the sum of its proper divisors (52563715).

13556445258173 is an equidigital number, since it uses as much as digits as its factorization.

13556445258173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52563714.

The product of its digits is 60480000, while the sum is 59.

The spelling of 13556445258173 in words is "thirteen trillion, five hundred fifty-six billion, four hundred forty-five million, two hundred fifty-eight thousand, one hundred seventy-three".