13256551771 has 32 divisors (see below), whose sum is σ = 15082889472. Its totient is φ = 11590410240.

The previous prime is 13256551751. The next prime is 13256551783. The reversal of 13256551771 is 17715565231.

It is a cyclic number.

It is not a de Polignac number, because 13256551771 - 2²⁵ = 13222997339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13256551751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1206615 + ... + 1217551.

It is an arithmetic number, because the mean of its divisors is an integer number (471340296).

Almost surely, 2^13256551771 is an apocalyptic number.

13256551771 is a deficient number, since it is larger than the sum of its proper divisors (1826337701).

13256551771 is a wasteful number, since it uses less digits than its factorization.

13256551771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11079.

The product of its digits is 220500, while the sum is 43.

The spelling of 13256551771 in words is "thirteen billion, two hundred fifty-six million, five hundred fifty-one thousand, seven hundred seventy-one".