520344655511 has 16 divisors (see below), whose sum is σ = 538173081600. Its totient is φ = 502910879328.

The previous prime is 520344655471. The next prime is 520344655547. The reversal of 520344655511 is 115556443025.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520344655511 is a prime.

It is a super-2 number, since 2×520344655511² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520344655211) 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 15 ways as a sum of consecutive naturals, for example, 350690 + ... + 1078736.

It is an arithmetic number, because the mean of its divisors is an integer number (33635817600).

Almost surely, 2^520344655511 is an apocalyptic number.

520344655511 is a deficient number, since it is larger than the sum of its proper divisors (17828426089).

520344655511 is a wasteful number, since it uses less digits than its factorization.

520344655511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728318.

The product of its (nonzero) digits is 360000, while the sum is 41.

The spelling of 520344655511 in words is "five hundred twenty billion, three hundred forty-four million, six hundred fifty-five thousand, five hundred eleven".