816547745618 has 16 divisors (see below), whose sum is σ = 1352267463456. Its totient is φ = 366686281440.

The previous prime is 816547745599. The next prime is 816547745621.

816547745618 is nontrivially palindromic in base 10.

It is a super-3 number, since 3×816547745618³ (a number of 37 digits) contains 333 as substring.

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, 223587371 + ... + 223591022.

It is an arithmetic number, because the mean of its divisors is an integer number (84516716466).

Almost surely, 2^816547745618 is an apocalyptic number.

816547745618 is a deficient number, since it is larger than the sum of its proper divisors (535719717838).

816547745618 is a wasteful number, since it uses less digits than its factorization.

816547745618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447178489.

The product of its digits is 45158400, while the sum is 62.

The spelling of 816547745618 in words is "eight hundred sixteen billion, five hundred forty-seven million, seven hundred forty-five thousand, six hundred eighteen".