51825729168 has 60 divisors (see below), whose sum is σ = 153571837068. Its totient is φ = 16259051520.

The previous prime is 51825729139. The next prime is 51825729181. The reversal of 51825729168 is 86192752815.

51825729168 is a `hidden beast` number, since 5 + 1 + 8 + 2 + 572 + 9 + 1 + 68 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32059618704 + 19766110464 = 179052^2 + 140592^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10582873 + ... + 10587768.

Almost surely, 2^51825729168 is an apocalyptic number.

It is an amenable number.

51825729168 is an abundant number, since it is smaller than the sum of its proper divisors (101746107900).

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

51825729168 is a wasteful number, since it uses less digits than its factorization.

51825729168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21170672 (or 21170663 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 54.

The spelling of 51825729168 in words is "fifty-one billion, eight hundred twenty-five million, seven hundred twenty-nine thousand, one hundred sixty-eight".