505613611636 has 24 divisors (see below), whose sum is σ = 1015458312960. Its totient is φ = 215784885792.

The previous prime is 505613611603. The next prime is 505613611649. The reversal of 505613611636 is 636116316505.

It is a junction number, because it is equal to n+sod(n) for n = 505613611592 and 505613611601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37770775 + ... + 37784158.

It is an arithmetic number, because the mean of its divisors is an integer number (42310763040).

Almost surely, 2^505613611636 is an apocalyptic number.

It is an amenable number.

505613611636 is an abundant number, since it is smaller than the sum of its proper divisors (509844701324).

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

505613611636 is a wasteful number, since it uses less digits than its factorization.

505613611636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75555183 (or 75555181 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 43.

It can be divided in two parts, 505613 and 611636, that added together give a square (1117249 = 1057²).

The spelling of 505613611636 in words is "five hundred five billion, six hundred thirteen million, six hundred eleven thousand, six hundred thirty-six".