505213236560 has 40 divisors (see below), whose sum is σ = 1243716118056. Its totient is φ = 190197923840.

The previous prime is 505213236557. The next prime is 505213236569. The reversal of 505213236560 is 65632312505.

It can be written as a sum of positive squares in 4 ways, for example, as 225727611664 + 279485624896 = 475108^2 + 528664^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505213236569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185738801 + ... + 185741520.

Almost surely, 2^505213236560 is an apocalyptic number.

It is an amenable number.

505213236560 is an abundant number, since it is smaller than the sum of its proper divisors (738502881496).

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

505213236560 is a wasteful number, since it uses less digits than its factorization.

505213236560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371480351 (or 371480345 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 38.

The spelling of 505213236560 in words is "five hundred five billion, two hundred thirteen million, two hundred thirty-six thousand, five hundred sixty".