84813838621 has 8 divisors (see below), whose sum is σ = 84935591384. Its totient is φ = 84692139840.

The previous prime is 84813838607. The next prime is 84813838643. The reversal of 84813838621 is 12683831848.

It can be written as a sum of positive squares in 4 ways, for example, as 24552025 + 84789286596 = 4955^2 + 291186^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84813838621 - 2¹¹ = 84813836573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84813838691) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3930955 + ... + 3952471.

It is an arithmetic number, because the mean of its divisors is an integer number (10616948923).

Almost surely, 2^84813838621 is an apocalyptic number.

It is an amenable number.

84813838621 is a deficient number, since it is larger than the sum of its proper divisors (121752763).

84813838621 is a wasteful number, since it uses less digits than its factorization.

84813838621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26991.

The product of its digits is 1769472, while the sum is 52.

The spelling of 84813838621 in words is "eighty-four billion, eight hundred thirteen million, eight hundred thirty-eight thousand, six hundred twenty-one".