816578012 has 12 divisors (see below), whose sum is σ = 1467633720. Its totient is φ = 397254096.

The previous prime is 816577981. The next prime is 816578033. The reversal of 816578012 is 210875618.

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 in 3 ways as a sum of consecutive naturals, for example, 2758562 + ... + 2758857.

It is an arithmetic number, because the mean of its divisors is an integer number (122302810).

Almost surely, 2^816578012 is an apocalyptic number.

It is an amenable number.

816578012 is a deficient number, since it is larger than the sum of its proper divisors (651055708).

816578012 is a wasteful number, since it uses less digits than its factorization.

816578012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517460 (or 5517458 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 816578012 is about 28575.8291568241. The cubic root of 816578012 is about 934.6863359206.

The spelling of 816578012 in words is "eight hundred sixteen million, five hundred seventy-eight thousand, twelve".