505000561001 has 4 divisors (see below), whose sum is σ = 534706476372. Its totient is φ = 475294645632.

The previous prime is 505000560991. The next prime is 505000561129. The reversal of 505000561001 is 100165000505.

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 473273826601 + 31726734400 = 687949^2 + 178120^2 .

It is a cyclic number.

It is not a de Polignac number, because 505000561001 - 2⁶ = 505000560937 is a prime.

It is a super-2 number, since 2×505000561001² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505000561501) 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 3 ways as a sum of consecutive naturals, for example, 14852957660 + ... + 14852957693.

It is an arithmetic number, because the mean of its divisors is an integer number (133676619093).

Almost surely, 2^505000561001 is an apocalyptic number.

It is an amenable number.

505000561001 is a deficient number, since it is larger than the sum of its proper divisors (29705915371).

505000561001 is a wasteful number, since it uses less digits than its factorization.

505000561001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29705915370.

The product of its (nonzero) digits is 750, while the sum is 23.

Adding to 505000561001 its reverse (100165000505), we get a palindrome (605165561506).

The spelling of 505000561001 in words is "five hundred five billion, five hundred sixty-one thousand, one".