51328843776 has 504 divisors, whose sum is σ = 181697162640. Its totient is φ = 14269022208.

The previous prime is 51328843771. The next prime is 51328843789. The reversal of 51328843776 is 67734882315.

It is a happy number.

51328843776 is a `hidden beast` number, since 5 + 132 + 8 + 8 + 437 + 76 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

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

Its product of digits (6773760) is a multiple of the sum of its prime divisors (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51328843771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1387266030 + ... + 1387266066.

Almost surely, 2^51328843776 is an apocalyptic number.

51328843776 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51328843776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90848581320).

51328843776 is an abundant number, since it is smaller than the sum of its proper divisors (130368318864).

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

51328843776 is an frugal number, since it uses more digits than its factorization.

51328843776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 49 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The spelling of 51328843776 in words is "fifty-one billion, three hundred twenty-eight million, eight hundred forty-three thousand, seven hundred seventy-six".