51773534208 has 624 divisors, whose sum is σ = 174130175520. Its totient is φ = 15182069760.

The previous prime is 51773534171. The next prime is 51773534209. The reversal of 51773534208 is 80243537715.

51773534208 is a `hidden beast` number, since 5 + 177 + 3 + 53 + 420 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51773534209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 709226460 + ... + 709226532.

Almost surely, 2^51773534208 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 51773534208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87065087760).

51773534208 is an abundant number, since it is smaller than the sum of its proper divisors (122356641312).

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

51773534208 is a wasteful number, since it uses less digits than its factorization.

51773534208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 51773534208 in words is "fifty-one billion, seven hundred seventy-three million, five hundred thirty-four thousand, two hundred eight".