15551648 has 24 divisors (see below), whose sum is σ = 34991712. Its totient is φ = 6664896.

The previous prime is 15551639. The next prime is 15551659. The reversal of 15551648 is 84615551.

It is a happy number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 34490 + ... + 34937.

It is an arithmetic number, because the mean of its divisors is an integer number (1457988).

Almost surely, 2^15551648 is an apocalyptic number.

It is an amenable number.

15551648 is an abundant number, since it is smaller than the sum of its proper divisors (19440064).

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

15551648 is an equidigital number, since it uses as much as digits as its factorization.

15551648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69444 (or 69436 counting only the distinct ones).

The product of its digits is 24000, while the sum is 35.

The square root of 15551648 is about 3943.5577845392. The cubic root of 15551648 is about 249.6081755486.

The spelling of 15551648 in words is "fifteen million, five hundred fifty-one thousand, six hundred forty-eight".