505646655 has 16 divisors (see below), whose sum is σ = 821111424. Its totient is φ = 265652640.

The previous prime is 505646653. The next prime is 505646671. The reversal of 505646655 is 556646505.

It is not a de Polignac number, because 505646655 - 2¹ = 505646653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505646653) 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 15 ways as a sum of consecutive naturals, for example, 250561 + ... + 252570.

It is an arithmetic number, because the mean of its divisors is an integer number (51319464).

Almost surely, 2^505646655 is an apocalyptic number.

505646655 is a deficient number, since it is larger than the sum of its proper divisors (315464769).

505646655 is a wasteful number, since it uses less digits than its factorization.

505646655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503206.

The product of its (nonzero) digits is 540000, while the sum is 42.

The square root of 505646655 is about 22486.5883361616. The cubic root of 505646655 is about 796.6771838702.

The spelling of 505646655 in words is "five hundred five million, six hundred forty-six thousand, six hundred fifty-five".