816468586 has 4 divisors (see below), whose sum is σ = 1224702882. Its totient is φ = 408234292.

The previous prime is 816468539. The next prime is 816468617. The reversal of 816468586 is 685864618.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 742835025 + 73633561 = 27255^2 + 8581^2 .

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 as a sum of consecutive naturals, namely, 204117145 + ... + 204117148.

Almost surely, 2^816468586 is an apocalyptic number.

816468586 is a deficient number, since it is larger than the sum of its proper divisors (408234296).

816468586 is a wasteful number, since it uses less digits than its factorization.

816468586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408234295.

The product of its digits is 2211840, while the sum is 52.

The square root of 816468586 is about 28573.9144325729. The cubic root of 816468586 is about 934.6445829978.

The spelling of 816468586 in words is "eight hundred sixteen million, four hundred sixty-eight thousand, five hundred eighty-six".