49569905449 has 3 divisors (see below), whose sum is σ = 49570128093. Its totient is φ = 49569682806.

The previous prime is 49569905431. The next prime is 49569905453. The reversal of 49569905449 is 94450996594.

The square root of 49569905449 is 222643.

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

49569905449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 is not a de Polignac number, because 49569905449 - 2¹⁹ = 49569381161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49569905459) 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, 111322 + ... + 333964.

It is an arithmetic number, because the mean of its divisors is an integer number (16523376031).

Almost surely, 2^49569905449 is an apocalyptic number.

49569905449 is the 222643-rd square number.

49569905449 is the 111322-nd centered octagonal number.

It is an amenable number.

49569905449 is a deficient number, since it is larger than the sum of its proper divisors (222644).

49569905449 is an frugal number, since it uses more digits than its factorization.

49569905449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445286 (or 222643 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 64.

Multiplying 49569905449 by its sum of digits (64), we get a square (3172473948736 = 1781144²).

The spelling of 49569905449 in words is "forty-nine billion, five hundred sixty-nine million, nine hundred five thousand, four hundred forty-nine".