516981618 has 24 divisors (see below), whose sum is σ = 1123523856. Its totient is φ = 171804600.

The previous prime is 516981613. The next prime is 516981643. The reversal of 516981618 is 816189615.

It is not an unprimeable number, because it can be changed into a prime (516981613) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37428 + ... + 49343.

It is an arithmetic number, because the mean of its divisors is an integer number (46813494).

Almost surely, 2^516981618 is an apocalyptic number.

516981618 is an abundant number, since it is smaller than the sum of its proper divisors (606542238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

516981618 is a wasteful number, since it uses less digits than its factorization.

516981618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87110 (or 87107 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 516981618 is about 22737.2297784932. The cubic root of 516981618 is about 802.5862230121.

The spelling of 516981618 in words is "five hundred sixteen million, nine hundred eighty-one thousand, six hundred eighteen".