816448619 has 4 divisors (see below), whose sum is σ = 933084144. Its totient is φ = 699813096.

The previous prime is 816448603. The next prime is 816448637. The reversal of 816448619 is 916844618.

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

It is a cyclic number.

It is not a de Polignac number, because 816448619 - 2⁴ = 816448603 is a prime.

It is a super-2 number, since 2×816448619² = 1333176694934014322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816448669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58317752 + ... + 58317765.

It is an arithmetic number, because the mean of its divisors is an integer number (233271036).

Almost surely, 2^816448619 is an apocalyptic number.

816448619 is a deficient number, since it is larger than the sum of its proper divisors (116635525).

816448619 is a wasteful number, since it uses less digits than its factorization.

816448619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116635524.

The product of its digits is 331776, while the sum is 47.

The square root of 816448619 is about 28573.5650383357. The cubic root of 816448619 is about 934.6369639251.

The spelling of 816448619 in words is "eight hundred sixteen million, four hundred forty-eight thousand, six hundred nineteen".