505256564 has 12 divisors (see below), whose sum is σ = 884925888. Its totient is φ = 252420600.

The previous prime is 505256537. The next prime is 505256567. The reversal of 505256564 is 465652505.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505256567) 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, 46382 + ... + 56229.

It is an arithmetic number, because the mean of its divisors is an integer number (73743824).

Almost surely, 2^505256564 is an apocalyptic number.

It is an amenable number.

505256564 is a deficient number, since it is larger than the sum of its proper divisors (379669324).

505256564 is a wasteful number, since it uses less digits than its factorization.

505256564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103846 (or 103844 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 38.

The square root of 505256564 is about 22477.9128034611. The cubic root of 505256564 is about 796.4722604328.

It can be divided in two parts, 5052 and 56564, that added together give a palindrome (61616).

The spelling of 505256564 in words is "five hundred five million, two hundred fifty-six thousand, five hundred sixty-four".