816816455 has 16 divisors (see below), whose sum is σ = 1206375744. Its totient is φ = 517017600.

The previous prime is 816816437. The next prime is 816816463. The reversal of 816816455 is 554618618.

816816455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 816816455 - 2¹⁸ = 816554311 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 897146 + ... + 898055.

It is an arithmetic number, because the mean of its divisors is an integer number (75398484).

Almost surely, 2^816816455 is an apocalyptic number.

816816455 is a deficient number, since it is larger than the sum of its proper divisors (389559289).

816816455 is a wasteful number, since it uses less digits than its factorization.

816816455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795226.

The product of its digits is 230400, while the sum is 44.

The square root of 816816455 is about 28580.0009622113. Note that the first 3 decimals coincide. The cubic root of 816816455 is about 934.7773040508. Note that the first 3 decimals are identical.

The spelling of 816816455 in words is "eight hundred sixteen million, eight hundred sixteen thousand, four hundred fifty-five".