15448749849 has 27 divisors (see below), whose sum is σ = 24171013503. Its totient is φ = 9503939952.

The previous prime is 15448749817. The next prime is 15448749863. The reversal of 15448749849 is 94894784451.

The square root of 15448749849 is 124293.

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

15448749849 is a `hidden beast` number, since 1 + 544 + 8 + 7 + 4 + 9 + 84 + 9 = 666.

15448749849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2285318025 + 13163431824 = 47805^2 + 114732^2 .

It is not a de Polignac number, because 15448749849 - 2⁵ = 15448749817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15448742849) 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 26 ways as a sum of consecutive naturals, for example, 4845834 + ... + 4849020.

Almost surely, 2^15448749849 is an apocalyptic number.

15448749849 is the 124293-rd square number.

15448749849 is the 62147-th centered octagonal number.

It is an amenable number.

15448749849 is a deficient number, since it is larger than the sum of its proper divisors (8722263654).

15448749849 is an frugal number, since it uses more digits than its factorization.

15448749849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6406 (or 3203 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 15448749849 in words is "fifteen billion, four hundred forty-eight million, seven hundred forty-nine thousand, eight hundred forty-nine".