15558857009 has 8 divisors (see below), whose sum is σ = 16388700000. Its totient is φ = 14730109632.

The previous prime is 15558856987. The next prime is 15558857021. The reversal of 15558857009 is 90075885551.

15558857009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 15558857009 - 2¹² = 15558852913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15558857029) 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 7 ways as a sum of consecutive naturals, for example, 244664 + ... + 301625.

It is an arithmetic number, because the mean of its divisors is an integer number (2048587500).

Almost surely, 2^15558857009 is an apocalyptic number.

15558857009 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

15558857009 is a deficient number, since it is larger than the sum of its proper divisors (829842991).

15558857009 is a wasteful number, since it uses less digits than its factorization.

15558857009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547807.

The product of its (nonzero) digits is 2520000, while the sum is 53.

The spelling of 15558857009 in words is "fifteen billion, five hundred fifty-eight million, eight hundred fifty-seven thousand, nine".