820359883271 has 4 divisors (see below), whose sum is σ = 846823105344. Its totient is φ = 793896661200.

The previous prime is 820359883267. The next prime is 820359883307. The reversal of 820359883271 is 172388953028.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 820359883271 - 2² = 820359883267 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 (820359883171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13231610990 + ... + 13231611051.

It is an arithmetic number, because the mean of its divisors is an integer number (211705776336).

Almost surely, 2^820359883271 is an apocalyptic number.

820359883271 is a deficient number, since it is larger than the sum of its proper divisors (26463222073).

820359883271 is a wasteful number, since it uses less digits than its factorization.

820359883271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26463222072.

The product of its (nonzero) digits is 5806080, while the sum is 56.

The spelling of 820359883271 in words is "eight hundred twenty billion, three hundred fifty-nine million, eight hundred eighty-three thousand, two hundred seventy-one".