480511561 has 4 divisors (see below), whose sum is σ = 501403392. Its totient is φ = 459619732.

The previous prime is 480511523. The next prime is 480511571. The reversal of 480511561 is 165115084.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 480511561 - 2⁷ = 480511433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (480511571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10445881 + ... + 10445926.

It is an arithmetic number, because the mean of its divisors is an integer number (125350848).

Almost surely, 2^480511561 is an apocalyptic number.

It is an amenable number.

480511561 is a deficient number, since it is larger than the sum of its proper divisors (20891831).

480511561 is a wasteful number, since it uses less digits than its factorization.

480511561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20891830.

The product of its (nonzero) digits is 4800, while the sum is 31.

The square root of 480511561 is about 21920.5739204064. The cubic root of 480511561 is about 783.2515813682.

The spelling of 480511561 in words is "four hundred eighty million, five hundred eleven thousand, five hundred sixty-one".