505404521564 has 24 divisors (see below), whose sum is σ = 893665870608. Its totient is φ = 250073942400.

The previous prime is 505404521561. The next prime is 505404521569. The reversal of 505404521564 is 465125404505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505404521561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487952 + ... + 1117544.

It is an arithmetic number, because the mean of its divisors is an integer number (37236077942).

Almost surely, 2^505404521564 is an apocalyptic number.

It is an amenable number.

505404521564 is a deficient number, since it is larger than the sum of its proper divisors (388261349044).

505404521564 is a wasteful number, since it uses less digits than its factorization.

505404521564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631685 (or 631683 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 41.

The spelling of 505404521564 in words is "five hundred five billion, four hundred four million, five hundred twenty-one thousand, five hundred sixty-four".