51021847080 has 256 divisors, whose sum is σ = 177972422400. Its totient is φ = 12987786240.

The previous prime is 51021847061. The next prime is 51021847081. The reversal of 51021847080 is 8074812015.

51021847080 is a `hidden beast` number, since 5 + 102 + 1 + 8 + 470 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51021847081) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2105835 + ... + 2129925.

It is an arithmetic number, because the mean of its divisors is an integer number (695204775).

Almost surely, 2^51021847080 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 51021847080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88986211200).

51021847080 is an abundant number, since it is smaller than the sum of its proper divisors (126950575320).

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

51021847080 is a wasteful number, since it uses less digits than its factorization.

51021847080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24201 (or 24191 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 51021847080 in words is "fifty-one billion, twenty-one million, eight hundred forty-seven thousand, eighty".