816206021914 has 4 divisors (see below), whose sum is σ = 1224309032874. Its totient is φ = 408103010956.

The previous prime is 816206021849. The next prime is 816206021957. The reversal of 816206021914 is 419120602618.

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., 589644301689 + 226561720225 = 767883^2 + 475985^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204051505477 + ... + 204051505480.

Almost surely, 2^816206021914 is an apocalyptic number.

816206021914 is a deficient number, since it is larger than the sum of its proper divisors (408103010960).

816206021914 is a wasteful number, since it uses less digits than its factorization.

816206021914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408103010959.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 816206021914 in words is "eight hundred sixteen billion, two hundred six million, twenty-one thousand, nine hundred fourteen".