505557657 has 12 divisors (see below), whose sum is σ = 796636464. Its totient is φ = 306398520.

The previous prime is 505557653. The next prime is 505557671. The reversal of 505557657 is 756755505.

It is not a de Polignac number, because 505557657 - 2² = 505557653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505557653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2553223 + ... + 2553420.

It is an arithmetic number, because the mean of its divisors is an integer number (66386372).

Almost surely, 2^505557657 is an apocalyptic number.

It is an amenable number.

505557657 is a deficient number, since it is larger than the sum of its proper divisors (291078807).

505557657 is a wasteful number, since it uses less digits than its factorization.

505557657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5106660 (or 5106657 counting only the distinct ones).

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

The square root of 505557657 is about 22484.6093361659. The cubic root of 505557657 is about 796.6304405330.

The spelling of 505557657 in words is "five hundred five million, five hundred fifty-seven thousand, six hundred fifty-seven".