816090004129 has 9 divisors (see below), whose sum is σ = 817810943313. Its totient is φ = 814372684452.

The previous prime is 816090004111. The next prime is 816090004133. The reversal of 816090004129 is 921400090618.

The square root of 816090004129 is 903377.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 816090004129 - 2⁵ = 816090004097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 816090004091 and 816090004100.

It is not an unprimeable number, because it can be changed into a prime (816090004529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 830202972 + ... + 830203954.

Almost surely, 2^816090004129 is an apocalyptic number.

816090004129 is the 903377-th square number.

816090004129 is the 451689-th centered octagonal number.

It is an amenable number.

816090004129 is a deficient number, since it is larger than the sum of its proper divisors (1720939184).

816090004129 is an frugal number, since it uses more digits than its factorization.

816090004129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3804 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 816090004129 in words is "eight hundred sixteen billion, ninety million, four thousand, one hundred twenty-nine".