820055263773 has 4 divisors (see below), whose sum is σ = 1093407018368. Its totient is φ = 546703509180.

The previous prime is 820055263771. The next prime is 820055263871. The reversal of 820055263773 is 377362550028.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 820055263773 - 2¹ = 820055263771 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 (820055263771) 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 3 ways as a sum of consecutive naturals, for example, 136675877293 + ... + 136675877298.

It is an arithmetic number, because the mean of its divisors is an integer number (273351754592).

Almost surely, 2^820055263773 is an apocalyptic number.

It is an amenable number.

820055263773 is a deficient number, since it is larger than the sum of its proper divisors (273351754595).

820055263773 is a wasteful number, since it uses less digits than its factorization.

820055263773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273351754594.

The product of its (nonzero) digits is 2116800, while the sum is 48.

The spelling of 820055263773 in words is "eight hundred twenty billion, fifty-five million, two hundred sixty-three thousand, seven hundred seventy-three".