51820674653212 has 12 divisors (see below), whose sum is σ = 93813290320680. Its totient is φ = 25016877418736.

The previous prime is 51820674653171. The next prime is 51820674653243. The reversal of 51820674653212 is 21235647602815.

51820674653212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51820674653212.

It is a congruent number.

It is an unprimeable number.

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, 223364976838 + ... + 223364977069.

It is an arithmetic number, because the mean of its divisors is an integer number (7817774193390).

Almost surely, 2^{51820674653212} is an apocalyptic number.

It is an amenable number.

51820674653212 is a deficient number, since it is larger than the sum of its proper divisors (41992615667468).

51820674653212 is a wasteful number, since it uses less digits than its factorization.

51820674653212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 446729953940 (or 446729953938 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 52.

The spelling of 51820674653212 in words is "fifty-one trillion, eight hundred twenty billion, six hundred seventy-four million, six hundred fifty-three thousand, two hundred twelve".