64404505 has 32 divisors (see below), whose sum is σ = 88128000. Its totient is φ = 44755200.

The previous prime is 64404479. The next prime is 64404533. The reversal of 64404505 is 50540446.

It is not a de Polignac number, because 64404505 - 2¹⁵ = 64371737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 237520 + ... + 237790.

It is an arithmetic number, because the mean of its divisors is an integer number (2754000).

Almost surely, 2^64404505 is an apocalyptic number.

It is an amenable number.

64404505 is a deficient number, since it is larger than the sum of its proper divisors (23723495).

64404505 is a wasteful number, since it uses less digits than its factorization.

64404505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 64404505 is about 8025.2417409072. The cubic root of 64404505 is about 400.8409495208.

The spelling of 64404505 in words is "sixty-four million, four hundred four thousand, five hundred five".