816458854618 has 64 divisors (see below), whose sum is σ = 1371198181248. Its totient is φ = 361478430720.

The previous prime is 816458854553. The next prime is 816458854643.

816458854618 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×816458854618² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 816458854618.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222042996 + ... + 222046672.

It is an arithmetic number, because the mean of its divisors is an integer number (21424971582).

Almost surely, 2^816458854618 is an apocalyptic number.

816458854618 is a deficient number, since it is larger than the sum of its proper divisors (554739326630).

816458854618 is a wasteful number, since it uses less digits than its factorization.

816458854618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5407.

The product of its digits is 58982400, while the sum is 64.

The spelling of 816458854618 in words is "eight hundred sixteen billion, four hundred fifty-eight million, eight hundred fifty-four thousand, six hundred eighteen".