15556330161 has 48 divisors (see below), whose sum is σ = 23847445440. Its totient is φ = 9744624000.

The previous prime is 15556330159. The next prime is 15556330169. The reversal of 15556330161 is 16103365551.

15556330161 is a `hidden beast` number, since 1 + 5 + 5 + 5 + 633 + 0 + 16 + 1 = 666.

It is not a de Polignac number, because 15556330161 - 2¹ = 15556330159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (15556330169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12575235 + ... + 12576471.

It is an arithmetic number, because the mean of its divisors is an integer number (496821780).

Almost surely, 2^15556330161 is an apocalyptic number.

It is an amenable number.

15556330161 is a deficient number, since it is larger than the sum of its proper divisors (8291115279).

15556330161 is a wasteful number, since it uses less digits than its factorization.

15556330161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806 (or 1803 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The spelling of 15556330161 in words is "fifteen billion, five hundred fifty-six million, three hundred thirty thousand, one hundred sixty-one".