816543626345618 has 32 divisors (see below), whose sum is σ = 1232246657894400. Its totient is φ = 405802213433344.

The previous prime is 816543626345599. The next prime is 816543626345633.

816543626345618 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 715093823 + ... + 716234781.

It is an arithmetic number, because the mean of its divisors is an integer number (38507708059200).

Almost surely, 2^{816543626345618} is an apocalyptic number.

816543626345618 is a deficient number, since it is larger than the sum of its proper divisors (415703031548782).

816543626345618 is a wasteful number, since it uses less digits than its factorization.

816543626345618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144234.

The product of its digits is 597196800, while the sum is 68.

The spelling of 816543626345618 in words is "eight hundred sixteen trillion, five hundred forty-three billion, six hundred twenty-six million, three hundred forty-five thousand, six hundred eighteen".