15728580009 has 12 divisors (see below), whose sum is σ = 23333089156. Its totient is φ = 10202321952.

The previous prime is 15728579989. The next prime is 15728580017. The reversal of 15728580009 is 90008582751.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15072963984 + 655616025 = 122772^2 + 25605^2 .

It is not a de Polignac number, because 15728580009 - 2¹² = 15728575913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15728580029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23616154 + ... + 23616819.

Almost surely, 2^15728580009 is an apocalyptic number.

It is an amenable number.

15728580009 is a deficient number, since it is larger than the sum of its proper divisors (7604509147).

15728580009 is a wasteful number, since it uses less digits than its factorization.

15728580009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47233016 (or 47233013 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 45.

The spelling of 15728580009 in words is "fifteen billion, seven hundred twenty-eight million, five hundred eighty thousand, nine".