13256642155 has 4 divisors (see below), whose sum is σ = 15907970592. Its totient is φ = 10605313720.

The previous prime is 13256642141. The next prime is 13256642207. The reversal of 13256642155 is 55124665231.

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

It is not a de Polignac number, because 13256642155 - 2²³ = 13248253547 is a prime.

It is a super-2 number, since 2×13256642155² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 1325664211 + ... + 1325664220.

It is an arithmetic number, because the mean of its divisors is an integer number (3976992648).

Almost surely, 2^13256642155 is an apocalyptic number.

13256642155 is a deficient number, since it is larger than the sum of its proper divisors (2651328437).

13256642155 is an equidigital number, since it uses as much as digits as its factorization.

13256642155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651328436.

The product of its digits is 216000, while the sum is 40.

The spelling of 13256642155 in words is "thirteen billion, two hundred fifty-six million, six hundred forty-two thousand, one hundred fifty-five".