518996172801 has 4 divisors (see below), whose sum is σ = 691994897072. Its totient is φ = 345997448532.

The previous prime is 518996172743. The next prime is 518996172833. The reversal of 518996172801 is 108271699815.

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 518996172801 - 2¹⁹ = 518995648513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518996171801) 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, 86499362131 + ... + 86499362136.

It is an arithmetic number, because the mean of its divisors is an integer number (172998724268).

Almost surely, 2^518996172801 is an apocalyptic number.

It is an amenable number.

518996172801 is a deficient number, since it is larger than the sum of its proper divisors (172998724271).

518996172801 is a wasteful number, since it uses less digits than its factorization.

518996172801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172998724270.

The product of its (nonzero) digits is 2177280, while the sum is 57.

The spelling of 518996172801 in words is "five hundred eighteen billion, nine hundred ninety-six million, one hundred seventy-two thousand, eight hundred one".