51667764783228 has 288 divisors, whose sum is σ = 148308954393600. Its totient is φ = 15029141137920.

The previous prime is 51667764783163. The next prime is 51667764783247. The reversal of 51667764783228 is 82238746776615.

51667764783228 is a `hidden beast` number, since 5 + 1 + 6 + 67 + 76 + 478 + 3 + 2 + 28 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3254244426 + ... + 3254260302.

It is an arithmetic number, because the mean of its divisors is an integer number (514961647200).

Almost surely, 2^{51667764783228} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51667764783228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74154477196800).

51667764783228 is an abundant number, since it is smaller than the sum of its proper divisors (96641189610372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51667764783228 is a wasteful number, since it uses less digits than its factorization.

51667764783228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19297 (or 19292 counting only the distinct ones).

The product of its digits is 1137991680, while the sum is 72.

The spelling of 51667764783228 in words is "fifty-one trillion, six hundred sixty-seven billion, seven hundred sixty-four million, seven hundred eighty-three thousand, two hundred twenty-eight".