64448449 has 8 divisors (see below), whose sum is σ = 70122920. Its totient is φ = 58876416.

The previous prime is 64448401. The next prime is 64448453. The reversal of 64448449 is 94484446.

It can be written as a sum of positive squares in 4 ways, for example, as 13068225 + 51380224 = 3615^2 + 7168^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64448449 - 2⁹ = 64447937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64448249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24294 + ... + 26815.

It is an arithmetic number, because the mean of its divisors is an integer number (8765365).

Almost surely, 2^64448449 is an apocalyptic number.

It is an amenable number.

64448449 is a deficient number, since it is larger than the sum of its proper divisors (5674471).

64448449 is a wasteful number, since it uses less digits than its factorization.

64448449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51219.

The product of its digits is 442368, while the sum is 43.

The square root of 64448449 is about 8027.9791354985. The cubic root of 64448449 is about 400.9320950599.

The spelling of 64448449 in words is "sixty-four million, four hundred forty-eight thousand, four hundred forty-nine".