51821614556716 has 24 divisors (see below), whose sum is σ = 92069070137856. Its totient is φ = 25519144371840.

The previous prime is 51821614556713. The next prime is 51821614556749. The reversal of 51821614556716 is 61765541612815.

It is a happy number.

51821614556716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51821614556713) 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 7 ways as a sum of consecutive naturals, for example, 372233515 + ... + 372372706.

It is an arithmetic number, because the mean of its divisors is an integer number (3836211255744).

Almost surely, 2^{51821614556716} is an apocalyptic number.

It is an amenable number.

51821614556716 is a deficient number, since it is larger than the sum of its proper divisors (40247455581140).

51821614556716 is a wasteful number, since it uses less digits than its factorization.

51821614556716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744606489 (or 744606487 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 58.

The spelling of 51821614556716 in words is "fifty-one trillion, eight hundred twenty-one billion, six hundred fourteen million, five hundred fifty-six thousand, seven hundred sixteen".