816716617618 has 16 divisors (see below), whose sum is σ = 1336501666656. Its totient is φ = 371219189440.

The previous prime is 816716617579. The next prime is 816716617699.

816716617618 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239296 + ... + 1300267.

It is an arithmetic number, because the mean of its divisors is an integer number (83531354166).

Almost surely, 2^816716617618 is an apocalyptic number.

816716617618 is a deficient number, since it is larger than the sum of its proper divisors (519785049038).

816716617618 is a wasteful number, since it uses less digits than its factorization.

816716617618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1563689.

The product of its digits is 4064256, while the sum is 58.

The spelling of 816716617618 in words is "eight hundred sixteen billion, seven hundred sixteen million, six hundred seventeen thousand, six hundred eighteen".