505555776 has 112 divisors (see below), whose sum is σ = 1621414080. Its totient is φ = 153192960.

The previous prime is 505555759. The next prime is 505555807. The reversal of 505555776 is 677555505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5710 + ... + 32306.

Almost surely, 2^505555776 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 505555776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (810707040).

505555776 is an abundant number, since it is smaller than the sum of its proper divisors (1115858304).

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

505555776 is a wasteful number, since it uses less digits than its factorization.

505555776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26629 (or 26613 counting only the distinct ones).

The product of its (nonzero) digits is 918750, while the sum is 45.

The square root of 505555776 is about 22484.5675075150. The cubic root of 505555776 is about 796.6294525390.

The spelling of 505555776 in words is "five hundred five million, five hundred fifty-five thousand, seven hundred seventy-six".