51280638846912 has 336 divisors, whose sum is σ = 164189003876352. Its totient is φ = 15822914595840.

The previous prime is 51280638846809. The next prime is 51280638846949. The reversal of 51280638846912 is 21964883608215.

51280638846912 is a `hidden beast` number, since 5 + 1 + 2 + 80 + 6 + 3 + 88 + 469 + 12 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 51280638846912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8776258 + ... + 13400894.

It is an arithmetic number, because the mean of its divisors is an integer number (488657749632).

Almost surely, 2^{51280638846912} 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 51280638846912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82094501938176).

51280638846912 is an abundant number, since it is smaller than the sum of its proper divisors (112908365029440).

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

51280638846912 is a wasteful number, since it uses less digits than its factorization.

51280638846912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4624718 (or 4624696 counting only the distinct ones).

The product of its (nonzero) digits is 39813120, while the sum is 63.

The spelling of 51280638846912 in words is "fifty-one trillion, two hundred eighty billion, six hundred thirty-eight million, eight hundred forty-six thousand, nine hundred twelve".