520162171836 has 12 divisors (see below), whose sum is σ = 1213711734312. Its totient is φ = 173387390608.

The previous prime is 520162171783. The next prime is 520162171843. The reversal of 520162171836 is 638171261025.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×520162171836² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21673423815 + ... + 21673423838.

It is an arithmetic number, because the mean of its divisors is an integer number (101142644526).

Almost surely, 2^520162171836 is an apocalyptic number.

It is an amenable number.

520162171836 is an abundant number, since it is smaller than the sum of its proper divisors (693549562476).

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

520162171836 is a wasteful number, since it uses less digits than its factorization.

520162171836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43346847660 (or 43346847658 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 520162171836 in words is "five hundred twenty billion, one hundred sixty-two million, one hundred seventy-one thousand, eight hundred thirty-six".