13280878011281 has 4 divisors (see below), whose sum is σ = 13280933867700. Its totient is φ = 13280822154864.

The previous prime is 13280878011259. The next prime is 13280878011293. The reversal of 13280878011281 is 18211087808231.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7036201877056 + 6244676134225 = 2652584^2 + 2498935^2 .

It is a cyclic number.

It is not a de Polignac number, because 13280878011281 - 2⁴² = 8882831500177 is a prime.

It is a super-2 number, since 2×13280878011281² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13280878011781) 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, 27570026 + ... + 28047603.

It is an arithmetic number, because the mean of its divisors is an integer number (3320233466925).

Almost surely, 2^{13280878011281} is an apocalyptic number.

It is an amenable number.

13280878011281 is a deficient number, since it is larger than the sum of its proper divisors (55856419).

13280878011281 is an equidigital number, since it uses as much as digits as its factorization.

13280878011281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55856418.

The product of its (nonzero) digits is 344064, while the sum is 50.

The spelling of 13280878011281 in words is "thirteen trillion, two hundred eighty billion, eight hundred seventy-eight million, eleven thousand, two hundred eighty-one".