518561056240 has 80 divisors (see below), whose sum is σ = 1288759139136. Its totient is φ = 193566771200.

The previous prime is 518561056229. The next prime is 518561056267. The reversal of 518561056240 is 42650165815.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3361471 + ... + 3512350.

Almost surely, 2^518561056240 is an apocalyptic number.

It is an amenable number.

518561056240 is an abundant number, since it is smaller than the sum of its proper divisors (770198082896).

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

518561056240 is a wasteful number, since it uses less digits than its factorization.

518561056240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6873898 (or 6873892 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 43.

The spelling of 518561056240 in words is "five hundred eighteen billion, five hundred sixty-one million, fifty-six thousand, two hundred forty".