51944855508 has 216 divisors, whose sum is σ = 164809455720. Its totient is φ = 13673318400.

The previous prime is 51944855491. The next prime is 51944855509. The reversal of 51944855508 is 80555844915.

51944855508 is a `hidden beast` number, since 5 + 1 + 9 + 4 + 4 + 85 + 550 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14845472964 + 37099382544 = 121842^2 + 192612^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51944855509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 13780248 + ... + 13784016.

Almost surely, 2^51944855508 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 51944855508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82404727860).

51944855508 is an abundant number, since it is smaller than the sum of its proper divisors (112864600212).

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

51944855508 is a wasteful number, since it uses less digits than its factorization.

51944855508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4407 (or 4395 counting only the distinct ones).

The product of its (nonzero) digits is 5760000, while the sum is 54.

The spelling of 51944855508 in words is "fifty-one billion, nine hundred forty-four million, eight hundred fifty-five thousand, five hundred eight".