15855530888 has 12 divisors (see below), whose sum is σ = 29729788215. Its totient is φ = 7927587368.

The previous prime is 15855530881. The next prime is 15855530939. The reversal of 15855530888 is 88803555851.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 7927765444 + 7927765444 = 89038^2 + 89038^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=89038.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15855530881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 333893 + ... + 378411.

Almost surely, 2^15855530888 is an apocalyptic number.

It is an amenable number.

15855530888 is a deficient number, since it is larger than the sum of its proper divisors (13874257327).

15855530888 is an frugal number, since it uses more digits than its factorization.

15855530888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89044 (or 44521 counting only the distinct ones).

The product of its (nonzero) digits is 7680000, while the sum is 56.

The spelling of 15855530888 in words is "fifteen billion, eight hundred fifty-five million, five hundred thirty thousand, eight hundred eighty-eight".