15821486648 has 96 divisors (see below), whose sum is σ = 33479898480. Its totient is φ = 7001280000.

The previous prime is 15821486621. The next prime is 15821486651. The reversal of 15821486648 is 84668412851.

15821486648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a self number, because there is not a number n which added to its sum of digits gives 15821486648.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 7027523 + ... + 7029773.

Almost surely, 2^15821486648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15821486648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16739949240).

15821486648 is an abundant number, since it is smaller than the sum of its proper divisors (17658411832).

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

15821486648 is a wasteful number, since it uses less digits than its factorization.

15821486648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469 (or 2454 counting only the distinct ones).

The product of its digits is 2949120, while the sum is 53.

The spelling of 15821486648 in words is "fifteen billion, eight hundred twenty-one million, four hundred eighty-six thousand, six hundred forty-eight".