816880216 has 8 divisors (see below), whose sum is σ = 1531650420. Its totient is φ = 408440104.

The previous prime is 816880199. The next prime is 816880231. The reversal of 816880216 is 612088618.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055006 + ... + 51055021.

Almost surely, 2^816880216 is an apocalyptic number.

It is an amenable number.

816880216 is a deficient number, since it is larger than the sum of its proper divisors (714770204).

816880216 is a wasteful number, since it uses less digits than its factorization.

816880216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102110033 (or 102110029 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 40.

The square root of 816880216 is about 28581.1164232610. The cubic root of 816880216 is about 934.8016264407.

The spelling of 816880216 in words is "eight hundred sixteen million, eight hundred eighty thousand, two hundred sixteen".