505538656 has 48 divisors (see below), whose sum is σ = 1204380576. Its totient is φ = 203913216.

The previous prime is 505538653. The next prime is 505538687. The reversal of 505538656 is 656835505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505538653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62571 + ... + 70186.

It is an arithmetic number, because the mean of its divisors is an integer number (25091262).

Almost surely, 2^505538656 is an apocalyptic number.

505538656 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

505538656 is an abundant number, since it is smaller than the sum of its proper divisors (698841920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505538656 is a wasteful number, since it uses less digits than its factorization.

505538656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132791 (or 132783 counting only the distinct ones).

The product of its (nonzero) digits is 540000, while the sum is 43.

The square root of 505538656 is about 22484.1867987259. The cubic root of 505538656 is about 796.6204601582.

The spelling of 505538656 in words is "five hundred five million, five hundred thirty-eight thousand, six hundred fifty-six".