15081559249 has 9 divisors (see below), whose sum is σ = 15176342811. Its totient is φ = 14987366280.

The previous prime is 15081559247. The next prime is 15081559253. The reversal of 15081559249 is 94295518051.

The square root of 15081559249 is 122807.

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

15081559249 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., 5991843649 + 9089715600 = 77407^2 + 95340^2 .

It is not a de Polignac number, because 15081559249 - 2¹ = 15081559247 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15081559247) 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, 27876919 + ... + 27877459.

Almost surely, 2^15081559249 is an apocalyptic number.

15081559249 is the 122807-th square number.

15081559249 is the 61404-th centered octagonal number.

It is an amenable number.

15081559249 is a deficient number, since it is larger than the sum of its proper divisors (94783562).

15081559249 is an frugal number, since it uses more digits than its factorization.

15081559249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 49.

Multiplying 15081559249 by its sum of digits (49), we get a square (738996403201 = 859649²).

The spelling of 15081559249 in words is "fifteen billion, eighty-one million, five hundred fifty-nine thousand, two hundred forty-nine".