821490462976 has 72 divisors (see below), whose sum is σ = 1698900033600. Its totient is φ = 395977451520.

The previous prime is 821490462913. The next prime is 821490462979. The reversal of 821490462976 is 679264094128.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a self number, because there is not a number n which added to its sum of digits gives 821490462976.

It is not an unprimeable number, because it can be changed into a prime (821490462979) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4808461 + ... + 4976371.

It is an arithmetic number, because the mean of its divisors is an integer number (23595833800).

Almost surely, 2^821490462976 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 821490462976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (849450016800).

821490462976 is an abundant number, since it is smaller than the sum of its proper divisors (877409570624).

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

821490462976 is a wasteful number, since it uses less digits than its factorization.

821490462976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168615 (or 168601 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 821490462976 in words is "eight hundred twenty-one billion, four hundred ninety million, four hundred sixty-two thousand, nine hundred seventy-six".