820871298079 has 6 divisors (see below), whose sum is σ = 954891101904. Its totient is φ = 703603969740.

The previous prime is 820871298067. The next prime is 820871298103. The reversal of 820871298079 is 970892178028.

It is not a de Polignac number, because 820871298079 - 2⁹ = 820871297567 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 (820871290079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8376237687 + ... + 8376237784.

It is an arithmetic number, because the mean of its divisors is an integer number (159148516984).

Almost surely, 2^820871298079 is an apocalyptic number.

820871298079 is a deficient number, since it is larger than the sum of its proper divisors (134019803825).

820871298079 is a wasteful number, since it uses less digits than its factorization.

820871298079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16752475485 (or 16752475478 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 61.

The spelling of 820871298079 in words is "eight hundred twenty billion, eight hundred seventy-one million, two hundred ninety-eight thousand, seventy-nine".