49439981261449 has 3 divisors (see below), whose sum is σ = 49439988292807. Its totient is φ = 49439974230092.

The previous prime is 49439981261443. The next prime is 49439981261521. The reversal of 49439981261449 is 94416218993494.

The square root of 49439981261449 is 7031357.

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., 46130245205625 + 3309736055824 = 6791925^2 + 1819268^2 .

It is not a de Polignac number, because 49439981261449 - 2³⁹ = 48890225447561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49439981261443) 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, 3515679 + ... + 10547035.

Almost surely, 2^{49439981261449} is an apocalyptic number.

49439981261449 is the 7031357-th square number.

49439981261449 is the 3515679-th centered octagonal number.

It is an amenable number.

49439981261449 is a deficient number, since it is larger than the sum of its proper divisors (7031358).

49439981261449 is an frugal number, since it uses more digits than its factorization.

49439981261449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14062714 (or 7031357 counting only the distinct ones).

The product of its digits is 483729408, while the sum is 73.

The spelling of 49439981261449 in words is "forty-nine trillion, four hundred thirty-nine billion, nine hundred eighty-one million, two hundred sixty-one thousand, four hundred forty-nine".