816217604 has 24 divisors (see below), whose sum is σ = 1466169600. Its totient is φ = 397400256.

The previous prime is 816217573. The next prime is 816217621. The reversal of 816217604 is 406712618.

It is a super-2 number, since 2×816217604² = 1332422354159001632, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26504 + ... + 48320.

It is an arithmetic number, because the mean of its divisors is an integer number (61090400).

Almost surely, 2^816217604 is an apocalyptic number.

It is an amenable number.

816217604 is a deficient number, since it is larger than the sum of its proper divisors (649951996).

816217604 is a wasteful number, since it uses less digits than its factorization.

816217604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22067 (or 22065 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 816217604 is about 28569.5222921210. The cubic root of 816217604 is about 934.5488034372.

The spelling of 816217604 in words is "eight hundred sixteen million, two hundred seventeen thousand, six hundred four".