520117771220 has 96 divisors (see below), whose sum is σ = 1208300599296. Its totient is φ = 187377062400.

The previous prime is 520117771213. The next prime is 520117771231. The reversal of 520117771220 is 22177711025.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 34730 + ... + 1020510.

It is an arithmetic number, because the mean of its divisors is an integer number (12586464576).

Almost surely, 2^520117771220 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 520117771220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (604150299648).

520117771220 is an abundant number, since it is smaller than the sum of its proper divisors (688182828076).

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

520117771220 is a wasteful number, since it uses less digits than its factorization.

520117771220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 985881 (or 985879 counting only the distinct ones).

The product of its (nonzero) digits is 13720, while the sum is 35.

The spelling of 520117771220 in words is "five hundred twenty billion, one hundred seventeen million, seven hundred seventy-one thousand, two hundred twenty".