518349495021 has 16 divisors (see below), whose sum is σ = 694203187200. Its totient is φ = 344031812208.

The previous prime is 518349494989. The next prime is 518349495031. The reversal of 518349495021 is 120594943815.

It is not a de Polignac number, because 518349495021 - 2⁵ = 518349494989 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518349495031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2753220 + ... + 2935458.

It is an arithmetic number, because the mean of its divisors is an integer number (43387699200).

Almost surely, 2^518349495021 is an apocalyptic number.

It is an amenable number.

518349495021 is a deficient number, since it is larger than the sum of its proper divisors (175853692179).

518349495021 is a wasteful number, since it uses less digits than its factorization.

518349495021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186448.

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 518349495021 in words is "five hundred eighteen billion, three hundred forty-nine million, four hundred ninety-five thousand, twenty-one".