13256155555 has 4 divisors (see below), whose sum is σ = 15907386672. Its totient is φ = 10604924440.

The previous prime is 13256155529. The next prime is 13256155567. The reversal of 13256155555 is 55555165231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55555165231 = 929 ⋅59801039.

It is not a de Polignac number, because 13256155555 - 2¹³ = 13256147363 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1325615551 + ... + 1325615560.

It is an arithmetic number, because the mean of its divisors is an integer number (3976846668).

Almost surely, 2^13256155555 is an apocalyptic number.

13256155555 is a deficient number, since it is larger than the sum of its proper divisors (2651231117).

13256155555 is an equidigital number, since it uses as much as digits as its factorization.

13256155555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651231116.

The product of its digits is 562500, while the sum is 43.

The spelling of 13256155555 in words is "thirteen billion, two hundred fifty-six million, one hundred fifty-five thousand, five hundred fifty-five".