520430553561 has 8 divisors (see below), whose sum is σ = 693956993760. Its totient is φ = 346928907872.

The previous prime is 520430553557. The next prime is 520430553581. The reversal of 520430553561 is 165355034025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 520430553561 - 2² = 520430553557 is a prime.

It is a super-2 number, since 2×520430553561² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520430553521) 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 7 ways as a sum of consecutive naturals, for example, 6149595 + ... + 6233648.

It is an arithmetic number, because the mean of its divisors is an integer number (86744624220).

Almost surely, 2^520430553561 is an apocalyptic number.

It is an amenable number.

520430553561 is a deficient number, since it is larger than the sum of its proper divisors (173526440199).

520430553561 is a wasteful number, since it uses less digits than its factorization.

520430553561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12397255.

The product of its (nonzero) digits is 270000, while the sum is 39.

Adding to 520430553561 its reverse (165355034025), we get a palindrome (685785587586).

The spelling of 520430553561 in words is "five hundred twenty billion, four hundred thirty million, five hundred fifty-three thousand, five hundred sixty-one".