13011878881 has 4 divisors (see below), whose sum is σ = 13012562452. Its totient is φ = 13011195312.

The previous prime is 13011878879. The next prime is 13011878917. The reversal of 13011878881 is 18887811031.

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 2849424400 + 10162454481 = 53380^2 + 100809^2 .

It is a cyclic number.

It is not a de Polignac number, because 13011878881 - 2¹ = 13011878879 is a prime.

It is a super-2 number, since 2×13011878881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13011878381) 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, 312390 + ... + 351583.

It is an arithmetic number, because the mean of its divisors is an integer number (3253140613).

Almost surely, 2^13011878881 is an apocalyptic number.

It is an amenable number.

13011878881 is a deficient number, since it is larger than the sum of its proper divisors (683571).

13011878881 is an equidigital number, since it uses as much as digits as its factorization.

13011878881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683570.

The product of its (nonzero) digits is 86016, while the sum is 46.

The spelling of 13011878881 in words is "thirteen billion, eleven million, eight hundred seventy-eight thousand, eight hundred eighty-one".