51635005440 has 192 divisors, whose sum is σ = 169037668800. Its totient is φ = 13448773632.

The previous prime is 51635005421. The next prime is 51635005469. The reversal of 51635005440 is 4450053615.

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1301416 + ... + 1340504.

It is an arithmetic number, because the mean of its divisors is an integer number (880404525).

Almost surely, 2^51635005440 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 51635005440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84518834400).

51635005440 is an abundant number, since it is smaller than the sum of its proper divisors (117402663360).

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

51635005440 is a wasteful number, since it uses less digits than its factorization.

51635005440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39162 (or 39142 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 51635005440 in words is "fifty-one billion, six hundred thirty-five million, five thousand, four hundred forty".