816145071 has 32 divisors (see below), whose sum is σ = 1265983488. Its totient is φ = 458045280.

The previous prime is 816145067. The next prime is 816145073. The reversal of 816145071 is 170541618.

It is a happy number.

816145071 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 816145071 - 2² = 816145067 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816145073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 456846 + ... + 458628.

It is an arithmetic number, because the mean of its divisors is an integer number (39561984).

Almost surely, 2^816145071 is an apocalyptic number.

816145071 is a deficient number, since it is larger than the sum of its proper divisors (449838417).

816145071 is a wasteful number, since it uses less digits than its factorization.

816145071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 816145071 is about 28568.2528517234. The cubic root of 816145071 is about 934.5211197917.

Adding to 816145071 its reverse (170541618), we get a palindrome (986686689).

The spelling of 816145071 in words is "eight hundred sixteen million, one hundred forty-five thousand, seventy-one".