842261821832 has 12 divisors (see below), whose sum is σ = 1579245783045. Its totient is φ = 421129613024.

The previous prime is 842261821829. The next prime is 842261821837. The reversal of 842261821832 is 238128162248.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 546484648516 + 295777173316 = 739246^2 + 543854^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=648946.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842261821837) 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 2 ways as a sum of consecutive naturals, for example, 2433548 + ... + 2758020.

Almost surely, 2^842261821832 is an apocalyptic number.

It is an amenable number.

842261821832 is a deficient number, since it is larger than the sum of its proper divisors (736983961213).

842261821832 is an frugal number, since it uses more digits than its factorization.

842261821832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648952 (or 324475 counting only the distinct ones).

The product of its digits is 589824, while the sum is 47.

The spelling of 842261821832 in words is "eight hundred forty-two billion, two hundred sixty-one million, eight hundred twenty-one thousand, eight hundred thirty-two".