821614065 has 16 divisors (see below), whose sum is σ = 1315045248. Its totient is φ = 438039936.

The previous prime is 821614043. The next prime is 821614121. The reversal of 821614065 is 560416128.

It is not a de Polignac number, because 821614065 - 2¹¹ = 821612017 is a prime.

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, 44037 + ... + 59853.

It is an arithmetic number, because the mean of its divisors is an integer number (82190328).

Almost surely, 2^821614065 is an apocalyptic number.

It is an amenable number.

821614065 is a deficient number, since it is larger than the sum of its proper divisors (493431183).

821614065 is a wasteful number, since it uses less digits than its factorization.

821614065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19288.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 821614065 is about 28663.8110690117. The cubic root of 821614065 is about 936.6038854057.

The spelling of 821614065 in words is "eight hundred twenty-one million, six hundred fourteen thousand, sixty-five".