518720205372 has 12 divisors (see below), whose sum is σ = 1210347145896. Its totient is φ = 172906735120.

The previous prime is 518720205359. The next prime is 518720205373. The reversal of 518720205372 is 273502027815.

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

It is a super-2 number, since 2×518720205372² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518720205373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21613341879 + ... + 21613341902.

It is an arithmetic number, because the mean of its divisors is an integer number (100862262158).

Almost surely, 2^518720205372 is an apocalyptic number.

It is an amenable number.

518720205372 is an abundant number, since it is smaller than the sum of its proper divisors (691626940524).

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

518720205372 is a wasteful number, since it uses less digits than its factorization.

518720205372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43226683788 (or 43226683786 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 518720205372 in words is "five hundred eighteen billion, seven hundred twenty million, two hundred five thousand, three hundred seventy-two".