15663654242 has 16 divisors (see below), whose sum is σ = 25021378872. Its totient is φ = 7328520960.

The previous prime is 15663654241. The next prime is 15663654271. The reversal of 15663654242 is 24245636651.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14750345401 + 913308841 = 121451^2 + 30221^2 .

It is a junction number, because it is equal to n+sod(n) for n = 15663654193 and 15663654202.

It is not an unprimeable number, because it can be changed into a prime (15663654241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1325609 + ... + 1337372.

Almost surely, 2^15663654242 is an apocalyptic number.

15663654242 is a deficient number, since it is larger than the sum of its proper divisors (9357724630).

15663654242 is a wasteful number, since it uses less digits than its factorization.

15663654242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663173.

The product of its digits is 1036800, while the sum is 44.

The spelling of 15663654242 in words is "fifteen billion, six hundred sixty-three million, six hundred fifty-four thousand, two hundred forty-two".