816581926324 has 6 divisors (see below), whose sum is σ = 1429018371074. Its totient is φ = 408290963160.

The previous prime is 816581926319. The next prime is 816581926361. The reversal of 816581926324 is 423629185618.

It can be written as a sum of positive squares in only one way, i.e., 585622867600 + 230959058724 = 765260^2 + 480582^2 .

It is a congruent 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, 102072740787 + ... + 102072740794.

Almost surely, 2^816581926324 is an apocalyptic number.

It is an amenable number.

816581926324 is a deficient number, since it is larger than the sum of its proper divisors (612436444750).

816581926324 is a wasteful number, since it uses less digits than its factorization.

816581926324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204145481585 (or 204145481583 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 55.

The spelling of 816581926324 in words is "eight hundred sixteen billion, five hundred eighty-one million, nine hundred twenty-six thousand, three hundred twenty-four".