15849047449 has 9 divisors (see below), whose sum is σ = 16097698197. Its totient is φ = 15604185564.

The previous prime is 15849047411. The next prime is 15849047527. The reversal of 15849047449 is 94474094851.

It is a happy number.

The square root of 15849047449 is 125893.

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

15849047449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 15849047449 - 2⁹ = 15849046937 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 15849047449.

It is not an unprimeable number, because it can be changed into a prime (15849047849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8433892 + ... + 8435770.

It is an arithmetic number, because the mean of its divisors is an integer number (1788633133).

Almost surely, 2^15849047449 is an apocalyptic number.

15849047449 is the 125893-rd square number.

15849047449 is the 62947-th centered octagonal number.

It is an amenable number.

15849047449 is a deficient number, since it is larger than the sum of its proper divisors (248650748).

15849047449 is an frugal number, since it uses more digits than its factorization.

15849047449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892 (or 1946 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 15849047449 in words is "fifteen billion, eight hundred forty-nine million, forty-seven thousand, four hundred forty-nine".