126881683487329 has 3 divisors (see below), whose sum is σ = 126881694751507. Its totient is φ = 126881672223152.

The previous prime is 126881683487219. The next prime is 126881683487357. The reversal of 126881683487329 is 923784386188621.

The square root of 126881683487329 is 11264177.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 18620821584225 + 108260861903104 = 4315185^2 + 10404848^2 .

It is not a de Polignac number, because 126881683487329 - 2¹¹ = 126881683485281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126881683487389) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5632089 + ... + 16896265.

Almost surely, 2^{126881683487329} is an apocalyptic number.

126881683487329 is the 11264177-th square number.

126881683487329 is the 5632089-th centered octagonal number.

It is an amenable number.

126881683487329 is a deficient number, since it is larger than the sum of its proper divisors (11264178).

126881683487329 is an frugal number, since it uses more digits than its factorization.

126881683487329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22528354 (or 11264177 counting only the distinct ones).

The product of its digits is 1337720832, while the sum is 76.

The spelling of 126881683487329 in words is "one hundred twenty-six trillion, eight hundred eighty-one billion, six hundred eighty-three million, four hundred eighty-seven thousand, three hundred twenty-nine".