505655653 has 4 divisors (see below), whose sum is σ = 519322060. Its totient is φ = 491989248.

The previous prime is 505655651. The next prime is 505655719. The reversal of 505655653 is 356556505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 478428129 + 27227524 = 21873^2 + 5218^2 .

It is a cyclic number.

It is not a de Polignac number, because 505655653 - 2¹ = 505655651 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505655651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6833148 + ... + 6833221.

It is an arithmetic number, because the mean of its divisors is an integer number (129830515).

Almost surely, 2^505655653 is an apocalyptic number.

It is an amenable number.

505655653 is a deficient number, since it is larger than the sum of its proper divisors (13666407).

505655653 is a wasteful number, since it uses less digits than its factorization.

505655653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13666406.

The product of its (nonzero) digits is 337500, while the sum is 40.

The square root of 505655653 is about 22486.7884100865. The cubic root of 505655653 is about 796.6819094750.

The spelling of 505655653 in words is "five hundred five million, six hundred fifty-five thousand, six hundred fifty-three".