820055263772 has 24 divisors (see below), whose sum is σ = 1442979772416. Its totient is φ = 407776647168.

The previous prime is 820055263771. The next prime is 820055263871. The reversal of 820055263772 is 277362550028.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2351333 + ... + 2677475.

It is an arithmetic number, because the mean of its divisors is an integer number (60124157184).

Almost surely, 2^820055263772 is an apocalyptic number.

It is an amenable number.

820055263772 is a deficient number, since it is larger than the sum of its proper divisors (622924508644).

820055263772 is a wasteful number, since it uses less digits than its factorization.

820055263772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329597 (or 329595 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 47.

The spelling of 820055263772 in words is "eight hundred twenty billion, fifty-five million, two hundred sixty-three thousand, seven hundred seventy-two".