15660606242 has 18 divisors (see below), whose sum is σ = 23741209947. Its totient is φ = 7747742884.

The previous prime is 15660606239. The next prime is 15660606259. The reversal of 15660606242 is 24260606651.

15660606242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7830303121 + 7830303121 = 88489^2 + 88489^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=88489.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15660606196 and 15660606205.

It is an unprimeable number.

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 8 ways as a sum of consecutive naturals, for example, 18936233 + ... + 18937059.

Almost surely, 2^15660606242 is an apocalyptic number.

15660606242 is a deficient number, since it is larger than the sum of its proper divisors (8080603705).

15660606242 is an frugal number, since it uses more digits than its factorization.

15660606242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1870 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 15660606242 in words is "fifteen billion, six hundred sixty million, six hundred six thousand, two hundred forty-two".