518417945 has 16 divisors (see below), whose sum is σ = 655611840. Its totient is φ = 392445504.

The previous prime is 518417923. The next prime is 518417993. The reversal of 518417945 is 549714815.

It is a cyclic number.

It is not a de Polignac number, because 518417945 - 2¹² = 518413849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 518417896 and 518417905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93542 + ... + 98928.

It is an arithmetic number, because the mean of its divisors is an integer number (40975740).

Almost surely, 2^518417945 is an apocalyptic number.

It is an amenable number.

518417945 is a deficient number, since it is larger than the sum of its proper divisors (137193895).

518417945 is a wasteful number, since it uses less digits than its factorization.

518417945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6424.

The product of its digits is 201600, while the sum is 44.

The square root of 518417945 is about 22768.7932266952. The cubic root of 518417945 is about 803.3288092619.

The spelling of 518417945 in words is "five hundred eighteen million, four hundred seventeen thousand, nine hundred forty-five".