518678161 has 4 divisors (see below), whose sum is σ = 519735024. Its totient is φ = 517621300.

The previous prime is 518678141. The next prime is 518678189. The reversal of 518678161 is 161876815.

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 a cyclic number.

It is not a de Polignac number, because 518678161 - 2¹³ = 518669969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (518678141) 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, 527695 + ... + 528676.

It is an arithmetic number, because the mean of its divisors is an integer number (129933756).

Almost surely, 2^518678161 is an apocalyptic number.

It is an amenable number.

518678161 is a deficient number, since it is larger than the sum of its proper divisors (1056863).

518678161 is a wasteful number, since it uses less digits than its factorization.

518678161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056862.

The product of its digits is 80640, while the sum is 43.

The square root of 518678161 is about 22774.5068223222. The cubic root of 518678161 is about 803.4631950704.

The spelling of 518678161 in words is "five hundred eighteen million, six hundred seventy-eight thousand, one hundred sixty-one".