821894848344 has 24 divisors (see below), whose sum is σ = 2225965214460. Its totient is φ = 273964949424.

The previous prime is 821894848339. The next prime is 821894848361. The reversal of 821894848344 is 443848498128.

821894848344 is a `hidden beast` number, since 8 + 21 + 8 + 94 + 8 + 483 + 44 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×821894848344² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5707603042 + ... + 5707603185.

Almost surely, 2^821894848344 is an apocalyptic number.

It is an amenable number.

821894848344 is an abundant number, since it is smaller than the sum of its proper divisors (1404070366116).

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

821894848344 is a wasteful number, since it uses less digits than its factorization.

821894848344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11415206239 (or 11415206232 counting only the distinct ones).

The product of its digits is 56623104, while the sum is 63.

The spelling of 821894848344 in words is "eight hundred twenty-one billion, eight hundred ninety-four million, eight hundred forty-eight thousand, three hundred forty-four".