51799644 has 72 divisors (see below), whose sum is σ = 142137632. Its totient is φ = 15811200.

The previous prime is 51799639. The next prime is 51799661. The reversal of 51799644 is 44699715.

51799644 is a `hidden beast` number, since 517 + 9 + 96 + 44 = 666.

51799644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51799644.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 70302 + ... + 71034.

Almost surely, 2^51799644 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 51799644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71068816).

51799644 is an abundant number, since it is smaller than the sum of its proper divisors (90337988).

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

51799644 is a wasteful number, since it uses less digits than its factorization.

51799644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907 (or 902 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 51799644 is about 7197.1969543705. The cubic root of 51799644 is about 372.7711198286.

The spelling of 51799644 in words is "fifty-one million, seven hundred ninety-nine thousand, six hundred forty-four".