505445865 has 32 divisors (see below), whose sum is σ = 829526016. Its totient is φ = 262664640.

The previous prime is 505445813. The next prime is 505445873. The reversal of 505445865 is 568544505.

It is not a de Polignac number, because 505445865 - 2⁸ = 505445609 is a prime.

It is a Curzon number.

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, 390870 + ... + 392160.

It is an arithmetic number, because the mean of its divisors is an integer number (25922688).

Almost surely, 2^505445865 is an apocalyptic number.

It is an amenable number.

505445865 is a deficient number, since it is larger than the sum of its proper divisors (324080151).

505445865 is a wasteful number, since it uses less digits than its factorization.

505445865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949.

The product of its (nonzero) digits is 480000, while the sum is 42.

The square root of 505445865 is about 22482.1232315811. The cubic root of 505445865 is about 796.5717176066.

The spelling of 505445865 in words is "five hundred five million, four hundred forty-five thousand, eight hundred sixty-five".