15663412 has 6 divisors (see below), whose sum is σ = 27410978. Its totient is φ = 7831704.

The previous prime is 15663367. The next prime is 15663413. The reversal of 15663412 is 21436651.

It can be written as a sum of positive squares in only one way, i.e., 8976016 + 6687396 = 2996^2 + 2586^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15663413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957923 + ... + 1957930.

Almost surely, 2^15663412 is an apocalyptic number.

It is an amenable number.

15663412 is a deficient number, since it is larger than the sum of its proper divisors (11747566).

15663412 is a wasteful number, since it uses less digits than its factorization.

15663412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3915857 (or 3915855 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 15663412 is about 3957.7028690896. The cubic root of 15663412 is about 250.2046963519.

The spelling of 15663412 in words is "fifteen million, six hundred sixty-three thousand, four hundred twelve".