850138808221 has 8 divisors (see below), whose sum is σ = 852779117600. Its totient is φ = 847498932720.

The previous prime is 850138808191. The next prime is 850138808291. The reversal of 850138808221 is 122808831058.

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 850138808221 - 2²⁹ = 849601937309 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 (850138808291) 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 7 ways as a sum of consecutive naturals, for example, 4064950 + ... + 4268968.

It is an arithmetic number, because the mean of its divisors is an integer number (106597389700).

Almost surely, 2^850138808221 is an apocalyptic number.

It is an amenable number.

850138808221 is a deficient number, since it is larger than the sum of its proper divisors (2640309379).

850138808221 is a wasteful number, since it uses less digits than its factorization.

850138808221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216939.

The product of its (nonzero) digits is 245760, while the sum is 46.

The spelling of 850138808221 in words is "eight hundred fifty billion, one hundred thirty-eight million, eight hundred eight thousand, two hundred twenty-one".