816580085618 has 16 divisors (see below), whose sum is σ = 1336238078400. Its totient is φ = 371168288400.

The previous prime is 816580085603. The next prime is 816580085627.

816580085618 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2247308 + ... + 2585256.

It is an arithmetic number, because the mean of its divisors is an integer number (83514879900).

Almost surely, 2^816580085618 is an apocalyptic number.

816580085618 is a deficient number, since it is larger than the sum of its proper divisors (519657992782).

816580085618 is a wasteful number, since it uses less digits than its factorization.

816580085618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447793.

The product of its (nonzero) digits is 3686400, while the sum is 56.

The spelling of 816580085618 in words is "eight hundred sixteen billion, five hundred eighty million, eighty-five thousand, six hundred eighteen".