505805859 has 24 divisors (see below), whose sum is σ = 828223760. Its totient is φ = 294881472.

The previous prime is 505805843. The next prime is 505805899. The reversal of 505805859 is 958508505.

It is not a de Polignac number, because 505805859 - 2⁴ = 505805843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505805899) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111544 + ... + 115989.

Almost surely, 2^505805859 is an apocalyptic number.

505805859 is a deficient number, since it is larger than the sum of its proper divisors (322417901).

505805859 is a wasteful number, since it uses less digits than its factorization.

505805859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227571 (or 227568 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 45.

The square root of 505805859 is about 22490.1280343176. The cubic root of 505805859 is about 796.7607869713.

The spelling of 505805859 in words is "five hundred five million, eight hundred five thousand, eight hundred fifty-nine".