51594660 has 144 divisors (see below), whose sum is σ = 178594416. Its totient is φ = 11943936.

The previous prime is 51594637. The next prime is 51594661. The reversal of 51594660 is 6649515.

51594660 is a `hidden beast` number, since 5 + 1 + 594 + 6 + 60 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 3069504 + 48525156 = 1752^2 + 6966^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (51594661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39132 + ... + 40428.

It is an arithmetic number, because the mean of its divisors is an integer number (1240239).

Almost surely, 2^51594660 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 51594660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89297208).

51594660 is an abundant number, since it is smaller than the sum of its proper divisors (126999756).

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

51594660 is a wasteful number, since it uses less digits than its factorization.

51594660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342 (or 1337 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 51594660 is about 7182.9422940742. The cubic root of 51594660 is about 372.2787539526.

The spelling of 51594660 in words is "fifty-one million, five hundred ninety-four thousand, six hundred sixty".