518313663 has 24 divisors (see below), whose sum is σ = 905961888. Its totient is φ = 278756352.

The previous prime is 518313647. The next prime is 518313721. The reversal of 518313663 is 366313815.

It is a happy number.

518313663 is a `hidden beast` number, since 518 + 3 + 136 + 6 + 3 = 666.

It is not a de Polignac number, because 518313663 - 2⁴ = 518313647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (518313163) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240906 + ... + 243047.

It is an arithmetic number, because the mean of its divisors is an integer number (37748412).

Almost surely, 2^518313663 is an apocalyptic number.

518313663 is a deficient number, since it is larger than the sum of its proper divisors (387648225).

518313663 is a wasteful number, since it uses less digits than its factorization.

518313663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483983 (or 483980 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 518313663 is about 22766.5030911644. The cubic root of 518313663 is about 803.2749413011.

The spelling of 518313663 in words is "five hundred eighteen million, three hundred thirteen thousand, six hundred sixty-three".