13475681553 has 4 divisors (see below), whose sum is σ = 17967575408. Its totient is φ = 8983787700.

The previous prime is 13475681539. The next prime is 13475681621. The reversal of 13475681553 is 35518657431.

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 not a de Polignac number, because 13475681553 - 2⁴ = 13475681537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13475681953) 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, 2245946923 + ... + 2245946928.

It is an arithmetic number, because the mean of its divisors is an integer number (4491893852).

Almost surely, 2^13475681553 is an apocalyptic number.

It is an amenable number.

13475681553 is a deficient number, since it is larger than the sum of its proper divisors (4491893855).

13475681553 is an equidigital number, since it uses as much as digits as its factorization.

13475681553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4491893854.

The product of its digits is 1512000, while the sum is 48.

The spelling of 13475681553 in words is "thirteen billion, four hundred seventy-five million, six hundred eighty-one thousand, five hundred fifty-three".