51939118080 has 880 divisors, whose sum is σ = 202231481760. Its totient is φ = 12697731072.

The previous prime is 51939118079. The next prime is 51939118103. The reversal of 51939118080 is 8081193915.

51939118080 is a `hidden beast` number, since 5 + 1 + 9 + 391 + 180 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 373662651 + ... + 373662789.

It is an arithmetic number, because the mean of its divisors is an integer number (229808502).

Almost surely, 2^51939118080 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 51939118080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101115740880).

51939118080 is an abundant number, since it is smaller than the sum of its proper divisors (150292363680).

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

51939118080 is a wasteful number, since it uses less digits than its factorization.

51939118080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 45.

The spelling of 51939118080 in words is "fifty-one billion, nine hundred thirty-nine million, one hundred eighteen thousand, eighty".