816147853 has 4 divisors (see below), whose sum is σ = 829527388. Its totient is φ = 802768320.

The previous prime is 816147821. The next prime is 816147919. The reversal of 816147853 is 358741618.

816147853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 358741618 = 2 ⋅179370809.

It can be written as a sum of positive squares in 2 ways, for example, as 352951369 + 463196484 = 18787^2 + 21522^2 .

It is a cyclic number.

It is not a de Polignac number, because 816147853 - 2⁵ = 816147821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816147803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6689676 + ... + 6689797.

It is an arithmetic number, because the mean of its divisors is an integer number (207381847).

Almost surely, 2^816147853 is an apocalyptic number.

It is an amenable number.

816147853 is a deficient number, since it is larger than the sum of its proper divisors (13379535).

816147853 is a wasteful number, since it uses less digits than its factorization.

816147853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13379534.

The product of its digits is 161280, while the sum is 43.

The square root of 816147853 is about 28568.3015420938. The cubic root of 816147853 is about 934.5221816269.

The spelling of 816147853 in words is "eight hundred sixteen million, one hundred forty-seven thousand, eight hundred fifty-three".