821875094433 has 24 divisors (see below), whose sum is σ = 1188380350976. Its totient is φ = 547350501600.

The previous prime is 821875094377. The next prime is 821875094477. The reversal of 821875094433 is 334490578128.

It is a happy number.

821875094433 is a `hidden beast` number, since 8 + 21 + 87 + 509 + 4 + 4 + 33 = 666.

It is not a de Polignac number, because 821875094433 - 2¹⁰ = 821875093409 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 821875094433.

It is not an unprimeable number, because it can be changed into a prime (821875094483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44089791 + ... + 44108427.

Almost surely, 2^821875094433 is an apocalyptic number.

It is an amenable number.

821875094433 is a deficient number, since it is larger than the sum of its proper divisors (366505256543).

821875094433 is a wasteful number, since it uses less digits than its factorization.

821875094433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23445 (or 23442 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 821875094433 in words is "eight hundred twenty-one billion, eight hundred seventy-five million, ninety-four thousand, four hundred thirty-three".