1521656448 has 256 divisors, whose sum is σ = 4708972800. Its totient is φ = 431456256.

The previous prime is 1521656441. The next prime is 1521656449. The reversal of 1521656448 is 8446561251.

It is not an unprimeable number, because it can be changed into a prime (1521656441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3329436 + ... + 3329892.

It is an arithmetic number, because the mean of its divisors is an integer number (18394425).

Almost surely, 2^1521656448 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 1521656448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2354486400).

1521656448 is an abundant number, since it is smaller than the sum of its proper divisors (3187316352).

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

1521656448 is a wasteful number, since it uses less digits than its factorization.

1521656448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 527 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 1521656448 is about 39008.4150921311. The cubic root of 1521656448 is about 1150.1969285944.

The spelling of 1521656448 in words is "one billion, five hundred twenty-one million, six hundred fifty-six thousand, four hundred forty-eight".