13261144343626 has 12 divisors (see below), whose sum is σ = 20993750672562. Its totient is φ = 6281594688744.

The previous prime is 13261144343597. The next prime is 13261144343633. The reversal of 13261144343626 is 62634344116231.

It can be written as a sum of positive squares in only one way, i.e., 8381308712401 + 4879835631225 = 2895049^2 + 2209035^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9183617245 + ... + 9183618688.

Almost surely, 2^{13261144343626} is an apocalyptic number.

13261144343626 is a deficient number, since it is larger than the sum of its proper divisors (7732606328936).

13261144343626 is a wasteful number, since it uses less digits than its factorization.

13261144343626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18367235973 (or 18367235954 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 46.

Adding to 13261144343626 its reverse (62634344116231), we get a palindrome (75895488459857).

The spelling of 13261144343626 in words is "thirteen trillion, two hundred sixty-one billion, one hundred forty-four million, three hundred forty-three thousand, six hundred twenty-six".