51651122516216 has 8 divisors (see below), whose sum is σ = 96845854717920. Its totient is φ = 25825561258104.

The previous prime is 51651122516183. The next prime is 51651122516219. The reversal of 51651122516216 is 61261522115615.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51651122516219) 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 as a sum of consecutive naturals, namely, 3228195157256 + ... + 3228195157271.

It is an arithmetic number, because the mean of its divisors is an integer number (12105731839740).

Almost surely, 2^{51651122516216} is an apocalyptic number.

It is an amenable number.

51651122516216 is a deficient number, since it is larger than the sum of its proper divisors (45194732201704).

51651122516216 is a wasteful number, since it uses less digits than its factorization.

51651122516216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456390314533 (or 6456390314529 counting only the distinct ones).

The product of its digits is 216000, while the sum is 44.

The spelling of 51651122516216 in words is "fifty-one trillion, six hundred fifty-one billion, one hundred twenty-two million, five hundred sixteen thousand, two hundred sixteen".