816576120538 has 8 divisors (see below), whose sum is σ = 1224872025300. Its totient is φ = 408285445440.

The previous prime is 816576120467. The next prime is 816576120539. The reversal of 816576120538 is 835021675618.

It can be written as a sum of positive squares in 2 ways, for example, as 762169158529 + 54406962009 = 873023^2 + 233253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (816576120539) 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, 890463 + ... + 1557586.

Almost surely, 2^816576120538 is an apocalyptic number.

816576120538 is a deficient number, since it is larger than the sum of its proper divisors (408295904762).

816576120538 is a wasteful number, since it uses less digits than its factorization.

816576120538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2614832.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 816576120538 in words is "eight hundred sixteen billion, five hundred seventy-six million, one hundred twenty thousand, five hundred thirty-eight".