51644160 has 108 divisors (see below), whose sum is σ = 178723272. Its totient is φ = 13768704.

The previous prime is 51644111. The next prime is 51644183. The reversal of 51644160 is 6144615.

51644160 is a `hidden beast` number, since 5 + 1 + 644 + 16 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9279 + ... + 13761.

Almost surely, 2^51644160 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 51644160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89361636).

51644160 is an abundant number, since it is smaller than the sum of its proper divisors (127079112).

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

51644160 is a wasteful number, since it uses less digits than its factorization.

51644160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4510 (or 4493 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 51644160 is about 7186.3871312364. The cubic root of 51644160 is about 372.3977708447.

Adding to 51644160 its reverse (6144615), we get a palindrome (57788775).

The spelling of 51644160 in words is "fifty-one million, six hundred forty-four thousand, one hundred sixty".