6520173371220 has 24 divisors (see below), whose sum is σ = 18256485439584. Its totient is φ = 1738712898976.

The previous prime is 6520173371209. The next prime is 6520173371237. The reversal of 6520173371220 is 221733710256.

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 7 ways as a sum of consecutive naturals, for example, 54334778034 + ... + 54334778153.

It is an arithmetic number, because the mean of its divisors is an integer number (760686893316).

Almost surely, 2^{6520173371220} is an apocalyptic number.

6520173371220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6520173371220 is an abundant number, since it is smaller than the sum of its proper divisors (11736312068364).

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

6520173371220 is a wasteful number, since it uses less digits than its factorization.

6520173371220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108669556199 (or 108669556197 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The spelling of 6520173371220 in words is "six trillion, five hundred twenty billion, one hundred seventy-three million, three hundred seventy-one thousand, two hundred twenty".