64821448 has 8 divisors (see below), whose sum is σ = 121540230. Its totient is φ = 32410720.

The previous prime is 64821443. The next prime is 64821457. The reversal of 64821448 is 84412846.

64821448 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 48191364 + 16630084 = 6942^2 + 4078^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (64821443) 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 as a sum of consecutive naturals, namely, 4051333 + ... + 4051348.

Almost surely, 2^64821448 is an apocalyptic number.

It is an amenable number.

64821448 is a deficient number, since it is larger than the sum of its proper divisors (56718782).

64821448 is a wasteful number, since it uses less digits than its factorization.

64821448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8102687 (or 8102683 counting only the distinct ones).

The product of its digits is 49152, while the sum is 37.

The square root of 64821448 is about 8051.1768083927. The cubic root of 64821448 is about 401.7040799694.

The spelling of 64821448 in words is "sixty-four million, eight hundred twenty-one thousand, four hundred forty-eight".