518143198953 has 4 divisors (see below), whose sum is σ = 690857598608. Its totient is φ = 345428799300.

The previous prime is 518143198931. The next prime is 518143198981. The reversal of 518143198953 is 359891341815.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 518143198953 - 2⁶ = 518143198889 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 518143198893 and 518143198902.

It is not an unprimeable number, because it can be changed into a prime (518143198913) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 86357199823 + ... + 86357199828.

It is an arithmetic number, because the mean of its divisors is an integer number (172714399652).

Almost surely, 2^518143198953 is an apocalyptic number.

It is an amenable number.

518143198953 is a deficient number, since it is larger than the sum of its proper divisors (172714399655).

518143198953 is a wasteful number, since it uses less digits than its factorization.

518143198953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172714399654.

The product of its digits is 4665600, while the sum is 57.

The spelling of 518143198953 in words is "five hundred eighteen billion, one hundred forty-three million, one hundred ninety-eight thousand, nine hundred fifty-three".