821016763 has 16 divisors (see below), whose sum is σ = 979969536. Its totient is φ = 672534720.

The previous prime is 821016739. The next prime is 821016769. The reversal of 821016763 is 367610128.

It is not a de Polignac number, because 821016763 - 2²⁵ = 787462331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (821016769) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 341895 + ... + 344287.

It is an arithmetic number, because the mean of its divisors is an integer number (61248096).

Almost surely, 2^821016763 is an apocalyptic number.

821016763 is a deficient number, since it is larger than the sum of its proper divisors (158952773).

821016763 is a wasteful number, since it uses less digits than its factorization.

821016763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4554.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 821016763 is about 28653.3900786626. The cubic root of 821016763 is about 936.3768643829.

The spelling of 821016763 in words is "eight hundred twenty-one million, sixteen thousand, seven hundred sixty-three".