505560656500 has 48 divisors (see below), whose sum is σ = 1107105055056. Its totient is φ = 201682032000.

The previous prime is 505560656453. The next prime is 505560656509. The reversal of 505560656500 is 5656065505.

It can be written as a sum of positive squares in 8 ways, for example, as 268892028304 + 236668628196 = 518548^2 + 486486^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505560656509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1168891 + ... + 1541890.

It is an arithmetic number, because the mean of its divisors is an integer number (23064688647).

Almost surely, 2^505560656500 is an apocalyptic number.

505560656500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

505560656500 is an abundant number, since it is smaller than the sum of its proper divisors (601544398556).

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

505560656500 is a wasteful number, since it uses less digits than its factorization.

505560656500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711173 (or 2711161 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 43.

The spelling of 505560656500 in words is "five hundred five billion, five hundred sixty million, six hundred fifty-six thousand, five hundred".