64442505 has 8 divisors (see below), whose sum is σ = 103108032. Its totient is φ = 34369328.

The previous prime is 64442479. The next prime is 64442533. The reversal of 64442505 is 50524446.

64442505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 64442505 - 2⁵ = 64442473 is a prime.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2148069 + ... + 2148098.

It is an arithmetic number, because the mean of its divisors is an integer number (12888504).

Almost surely, 2^64442505 is an apocalyptic number.

It is an amenable number.

64442505 is a deficient number, since it is larger than the sum of its proper divisors (38665527).

64442505 is a wasteful number, since it uses less digits than its factorization.

64442505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296175.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 64442505 is about 8027.6089217151. The cubic root of 64442505 is about 400.9197688587.

The spelling of 64442505 in words is "sixty-four million, four hundred forty-two thousand, five hundred five".