64444505 has 16 divisors (see below), whose sum is σ = 83303424. Its totient is φ = 47720640.

The previous prime is 64444489. The next prime is 64444511. The reversal of 64444505 is 50544446.

It is not a de Polignac number, because 64444505 - 2⁴ = 64444489 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5474 + ... + 12603.

It is an arithmetic number, because the mean of its divisors is an integer number (5206464).

Almost surely, 2^64444505 is an apocalyptic number.

It is an amenable number.

64444505 is a deficient number, since it is larger than the sum of its proper divisors (18858919).

64444505 is a wasteful number, since it uses less digits than its factorization.

64444505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18136.

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 64444505 is about 8027.7334908429. The cubic root of 64444505 is about 400.9239163865.

The spelling of 64444505 in words is "sixty-four million, four hundred forty-four thousand, five hundred five".