51073994880 has 768 divisors, whose sum is σ = 198393753600. Its totient is φ = 12373917696.

The previous prime is 51073994869. The next prime is 51073994887. The reversal of 51073994880 is 8849937015.

51073994880 is a `hidden beast` number, since 5 + 1 + 0 + 73 + 99 + 488 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51073994887) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 402157377 + ... + 402157503.

It is an arithmetic number, because the mean of its divisors is an integer number (258325200).

Almost surely, 2^51073994880 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 51073994880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99196876800).

51073994880 is an abundant number, since it is smaller than the sum of its proper divisors (147319758720).

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

51073994880 is a wasteful number, since it uses less digits than its factorization.

51073994880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 54.

The spelling of 51073994880 in words is "fifty-one billion, seventy-three million, nine hundred ninety-four thousand, eight hundred eighty".