505509646 has 16 divisors (see below), whose sum is σ = 770889888. Its totient is φ = 248580000.

The previous prime is 505509629. The next prime is 505509659. The reversal of 505509646 is 646905505.

It is a junction number, because it is equal to n+sod(n) for n = 505509599 and 505509608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22216 + ... + 38788.

It is an arithmetic number, because the mean of its divisors is an integer number (48180618).

Almost surely, 2^505509646 is an apocalyptic number.

505509646 is a deficient number, since it is larger than the sum of its proper divisors (265380242).

505509646 is a wasteful number, since it uses less digits than its factorization.

505509646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16827.

The product of its (nonzero) digits is 162000, while the sum is 40.

The square root of 505509646 is about 22483.5416694079. The cubic root of 505509646 is about 796.6052220214.

The spelling of 505509646 in words is "five hundred five million, five hundred nine thousand, six hundred forty-six".