518898609 has 16 divisors (see below), whose sum is σ = 773904000. Its totient is φ = 343608048.

The previous prime is 518898593. The next prime is 518898617. The reversal of 518898609 is 906898815.

It is not a de Polignac number, because 518898609 - 2⁴ = 518898593 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (518898409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60469 + ... + 68514.

It is an arithmetic number, because the mean of its divisors is an integer number (48369000).

Almost surely, 2^518898609 is an apocalyptic number.

It is an amenable number.

518898609 is a deficient number, since it is larger than the sum of its proper divisors (255005391).

518898609 is a wasteful number, since it uses less digits than its factorization.

518898609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129141 (or 129135 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 54.

The square root of 518898609 is about 22779.3461056282. The cubic root of 518898609 is about 803.5770079511.

The spelling of 518898609 in words is "five hundred eighteen million, eight hundred ninety-eight thousand, six hundred nine".