13381486968961 has 4 divisors (see below), whose sum is σ = 13381828957012. Its totient is φ = 13381144980912.

The previous prime is 13381486968929. The next prime is 13381486969013. The reversal of 13381486968961 is 16986968418331.

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 7679688000625 + 5701798968336 = 2771225^2 + 2387844^2 .

It is a cyclic number.

It is not a de Polignac number, because 13381486968961 - 2⁵ = 13381486968929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13381486968361) 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, 170935326 + ... + 171013591.

It is an arithmetic number, because the mean of its divisors is an integer number (3345457239253).

Almost surely, 2^{13381486968961} is an apocalyptic number.

It is an amenable number.

13381486968961 is a deficient number, since it is larger than the sum of its proper divisors (341988051).

13381486968961 is an equidigital number, since it uses as much as digits as its factorization.

13381486968961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341988050.

The product of its digits is 322486272, while the sum is 73.

The spelling of 13381486968961 in words is "thirteen trillion, three hundred eighty-one billion, four hundred eighty-six million, nine hundred sixty-eight thousand, nine hundred sixty-one".