13163266662561 has 24 divisors (see below), whose sum is σ = 19527778778664. Its totient is φ = 8538208289280.

The previous prime is 13163266662529. The next prime is 13163266662569. The reversal of 13163266662561 is 16526666236131.

It can be written as a sum of positive squares in 4 ways, for example, as 2222678448225 + 10940588214336 = 1490865^2 + 3307656^2 .

It is not a de Polignac number, because 13163266662561 - 2⁵ = 13163266662529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13163266662498 and 13163266662507.

It is not an unprimeable number, because it can be changed into a prime (13163266662569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25571641 + ... + 26081321.

It is an arithmetic number, because the mean of its divisors is an integer number (813657449111).

Almost surely, 2^{13163266662561} is an apocalyptic number.

It is an amenable number.

13163266662561 is a deficient number, since it is larger than the sum of its proper divisors (6364512116103).

13163266662561 is a wasteful number, since it uses less digits than its factorization.

13163266662561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587281 (or 587278 counting only the distinct ones).

The product of its digits is 8398080, while the sum is 54.

The spelling of 13163266662561 in words is "thirteen trillion, one hundred sixty-three billion, two hundred sixty-six million, six hundred sixty-two thousand, five hundred sixty-one".