15728728585 has 8 divisors (see below), whose sum is σ = 18875814336. Its totient is φ = 12582089520.

The previous prime is 15728728517. The next prime is 15728728591. The reversal of 15728728585 is 58582782751.

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

It is not a de Polignac number, because 15728728585 - 2⁹ = 15728728073 is a prime.

It is a super-2 number, since 2×15728728585² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28581 + ... + 179650.

It is an arithmetic number, because the mean of its divisors is an integer number (2359476792).

Almost surely, 2^15728728585 is an apocalyptic number.

It is an amenable number.

15728728585 is a deficient number, since it is larger than the sum of its proper divisors (3147085751).

15728728585 is a wasteful number, since it uses less digits than its factorization.

15728728585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223343.

The product of its digits is 12544000, while the sum is 58.

The spelling of 15728728585 in words is "fifteen billion, seven hundred twenty-eight million, seven hundred twenty-eight thousand, five hundred eighty-five".