518640071 has 8 divisors (see below), whose sum is σ = 532671744. Its totient is φ = 504698040.

The previous prime is 518640053. The next prime is 518640077. The reversal of 518640071 is 170046815.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 518640071 - 2¹⁰ = 518639047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518640077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10601 + ... + 33906.

It is an arithmetic number, because the mean of its divisors is an integer number (66583968).

Almost surely, 2^518640071 is an apocalyptic number.

518640071 is a deficient number, since it is larger than the sum of its proper divisors (14031673).

518640071 is a wasteful number, since it uses less digits than its factorization.

518640071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44821.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 518640071 is about 22773.6705649309. The cubic root of 518640071 is about 803.4435267002.

Adding to 518640071 its reverse (170046815), we get a palindrome (688686886).

The spelling of 518640071 in words is "five hundred eighteen million, six hundred forty thousand, seventy-one".