15728248549 has 8 divisors (see below), whose sum is σ = 16944381440. Its totient is φ = 14513011056.

The previous prime is 15728248537. The next prime is 15728248597. The reversal of 15728248549 is 94584282751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15728248549 - 2¹³ = 15728240357 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 15728248549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15728242549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187137 + ... + 257830.

It is an arithmetic number, because the mean of its divisors is an integer number (2118047680).

Almost surely, 2^15728248549 is an apocalyptic number.

It is an amenable number.

15728248549 is a deficient number, since it is larger than the sum of its proper divisors (1216132891).

15728248549 is a wasteful number, since it uses less digits than its factorization.

15728248549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447699.

The product of its digits is 6451200, while the sum is 55.

The spelling of 15728248549 in words is "fifteen billion, seven hundred twenty-eight million, two hundred forty-eight thousand, five hundred forty-nine".