15981648 has 20 divisors (see below), whose sum is σ = 41286048. Its totient is φ = 5327200.

The previous prime is 15981643. The next prime is 15981653. The reversal of 15981648 is 84618951.

It is an interprime number because it is at equal distance from previous prime (15981643) and next prime (15981653).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15981643) 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 3 ways as a sum of consecutive naturals, for example, 166428 + ... + 166523.

Almost surely, 2^15981648 is an apocalyptic number.

It is an amenable number.

15981648 is an abundant number, since it is smaller than the sum of its proper divisors (25304400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15981648 is a wasteful number, since it uses less digits than its factorization.

15981648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332962 (or 332956 counting only the distinct ones).

The product of its digits is 69120, while the sum is 42.

The square root of 15981648 is about 3997.7053418180. The cubic root of 15981648 is about 251.8878311578.

The spelling of 15981648 in words is "fifteen million, nine hundred eighty-one thousand, six hundred forty-eight".