518168146420 has 12 divisors (see below), whose sum is σ = 1088153107524. Its totient is φ = 207267258560.

The previous prime is 518168146403. The next prime is 518168146429. The reversal of 518168146420 is 24641861815.

It can be written as a sum of positive squares in 2 ways, for example, as 70130691684 + 448037454736 = 264822^2 + 669356^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518168146429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12954203641 + ... + 12954203680.

It is an arithmetic number, because the mean of its divisors is an integer number (90679425627).

Almost surely, 2^518168146420 is an apocalyptic number.

It is an amenable number.

518168146420 is an abundant number, since it is smaller than the sum of its proper divisors (569984961104).

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

518168146420 is a wasteful number, since it uses less digits than its factorization.

518168146420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25908407330 (or 25908407328 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The spelling of 518168146420 in words is "five hundred eighteen billion, one hundred sixty-eight million, one hundred forty-six thousand, four hundred twenty".