13261178712 has 64 divisors (see below), whose sum is σ = 35497634400. Its totient is φ = 4113612800.

The previous prime is 13261178683. The next prime is 13261178731. The reversal of 13261178712 is 21787116231.

It is a happy number.

13261178712 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146289 + ... + 218912.

Almost surely, 2^13261178712 is an apocalyptic number.

13261178712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13261178712 is an abundant number, since it is smaller than the sum of its proper divisors (22236455688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13261178712 is a wasteful number, since it uses less digits than its factorization.

13261178712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365316 (or 365312 counting only the distinct ones).

The product of its digits is 28224, while the sum is 39.

The spelling of 13261178712 in words is "thirteen billion, two hundred sixty-one million, one hundred seventy-eight thousand, seven hundred twelve".