816118453 has 12 divisors (see below), whose sum is σ = 859448268. Its totient is φ = 774868160.

The previous prime is 816118441. The next prime is 816118463. The reversal of 816118453 is 354811618.

It can be written as a sum of positive squares in 2 ways, for example, as 694744164 + 121374289 = 26358^2 + 11017^2 .

It is not a de Polignac number, because 816118453 - 2⁵ = 816118421 is a prime.

It is a super-2 number, since 2×816118453² = 1332098658654226418, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816118423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66843 + ... + 78103.

It is an arithmetic number, because the mean of its divisors is an integer number (71620689).

Almost surely, 2^816118453 is an apocalyptic number.

It is an amenable number.

816118453 is a deficient number, since it is larger than the sum of its proper divisors (43329815).

816118453 is a wasteful number, since it uses less digits than its factorization.

816118453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11444 (or 11421 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 816118453 is about 28567.7869811436. The cubic root of 816118453 is about 934.5109600973.

The spelling of 816118453 in words is "eight hundred sixteen million, one hundred eighteen thousand, four hundred fifty-three".