816570012 has 48 divisors (see below), whose sum is σ = 2006484480. Its totient is φ = 257957568.

The previous prime is 816569921. The next prime is 816570037. The reversal of 816570012 is 210075618.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 16513 + ... + 43655.

It is an arithmetic number, because the mean of its divisors is an integer number (41801760).

Almost surely, 2^816570012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 816570012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1003242240).

816570012 is an abundant number, since it is smaller than the sum of its proper divisors (1189914468).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816570012 is a wasteful number, since it uses less digits than its factorization.

816570012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27282 (or 27280 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 816570012 is about 28575.6891780408. The cubic root of 816570012 is about 934.6832835422.

The spelling of 816570012 in words is "eight hundred sixteen million, five hundred seventy thousand, twelve".