126481943449 has 3 divisors (see below), whose sum is σ = 126482299093. Its totient is φ = 126481587806.

The previous prime is 126481943437. The next prime is 126481943453. The reversal of 126481943449 is 944349184621.

The square root of 126481943449 is 355643.

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, and also an emirpimes, since its reverse is a distinct semiprime: 944349184621 = 47 ⋅20092535843.

It is a de Polignac number, because none of the positive numbers 2^k-126481943449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126481943449.

It is not an unprimeable number, because it can be changed into a prime (126481943249) 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, 177822 + ... + 533464.

Almost surely, 2^126481943449 is an apocalyptic number.

126481943449 is the 355643-rd square number.

126481943449 is the 177822-nd centered octagonal number.

It is an amenable number.

126481943449 is a deficient number, since it is larger than the sum of its proper divisors (355644).

126481943449 is an frugal number, since it uses more digits than its factorization.

126481943449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711286 (or 355643 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 55.

The spelling of 126481943449 in words is "one hundred twenty-six billion, four hundred eighty-one million, nine hundred forty-three thousand, four hundred forty-nine".