520680658680 has 1536 divisors, whose sum is σ = 2362795868160. Its totient is φ = 99970744320.

The previous prime is 520680658679. The next prime is 520680658723. The reversal of 520680658680 is 86856086025.

520680658680 is a `hidden beast` number, since 52 + 0 + 6 + 8 + 0 + 6 + 586 + 8 + 0 = 666.

It is a super-2 number, since 2×520680658680² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 466141482 + ... + 466142598.

It is an arithmetic number, because the mean of its divisors is an integer number (1538278560).

Almost surely, 2^520680658680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520680658680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1181397934080).

520680658680 is an abundant number, since it is smaller than the sum of its proper divisors (1842115209480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520680658680 is a wasteful number, since it uses less digits than its factorization.

520680658680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211 (or 1195 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 54.

The spelling of 520680658680 in words is "five hundred twenty billion, six hundred eighty million, six hundred fifty-eight thousand, six hundred eighty".