51995278960128 has 480 divisors, whose sum is σ = 181858612643136. Its totient is φ = 13961049145344.

The previous prime is 51995278960127. The next prime is 51995278960147. The reversal of 51995278960128 is 82106987259915.

51995278960128 is a `hidden beast` number, since 5 + 1 + 9 + 9 + 5 + 2 + 7 + 8 + 9 + 601 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51995278960127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 368970450 + ... + 369111342.

Almost surely, 2^{51995278960128} 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 51995278960128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90929306321568).

51995278960128 is an abundant number, since it is smaller than the sum of its proper divisors (129863333683008).

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

51995278960128 is a wasteful number, since it uses less digits than its factorization.

51995278960128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141614 (or 141595 counting only the distinct ones).

The product of its (nonzero) digits is 195955200, while the sum is 72.

The spelling of 51995278960128 in words is "fifty-one trillion, nine hundred ninety-five billion, two hundred seventy-eight million, nine hundred sixty thousand, one hundred twenty-eight".