816565476 has 12 divisors (see below), whose sum is σ = 1905319472. Its totient is φ = 272188488.

The previous prime is 816565457. The next prime is 816565501. The reversal of 816565476 is 674565618.

816565476 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34023550 + ... + 34023573.

Almost surely, 2^816565476 is an apocalyptic number.

It is an amenable number.

816565476 is an abundant number, since it is smaller than the sum of its proper divisors (1088753996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816565476 is a wasteful number, since it uses less digits than its factorization.

816565476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68047130 (or 68047128 counting only the distinct ones).

The product of its digits is 1209600, while the sum is 48.

The square root of 816565476 is about 28575.6098097661. The cubic root of 816565476 is about 934.6815528349.

The spelling of 816565476 in words is "eight hundred sixteen million, five hundred sixty-five thousand, four hundred seventy-six".