51439327680 has 448 divisors, whose sum is σ = 183242102400. Its totient is φ = 12225368064.

The previous prime is 51439327673. The next prime is 51439327691. The reversal of 51439327680 is 8672393415.

51439327680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1773769906 + ... + 1773769934.

It is an arithmetic number, because the mean of its divisors is an integer number (409022550).

It is a 1-persistent number, because it is pandigital, but 2⋅51439327680 = 102878655360 is not.

Almost surely, 2^51439327680 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 51439327680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91621051200).

51439327680 is an abundant number, since it is smaller than the sum of its proper divisors (131802774720).

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

51439327680 is an frugal number, since it uses more digits than its factorization.

51439327680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 52 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 48.

The spelling of 51439327680 in words is "fifty-one billion, four hundred thirty-nine million, three hundred twenty-seven thousand, six hundred eighty".