51544221044 has 24 divisors (see below), whose sum is σ = 92404337760. Its totient is φ = 25150172256.

The previous prime is 51544221011. The next prime is 51544221067. The reversal of 51544221044 is 44012244515.

It is a self number, because there is not a number n which added to its sum of digits gives 51544221044.

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 7 ways as a sum of consecutive naturals, for example, 870059 + ... + 927410.

It is an arithmetic number, because the mean of its divisors is an integer number (3850180740).

Almost surely, 2^51544221044 is an apocalyptic number.

It is an amenable number.

51544221044 is a deficient number, since it is larger than the sum of its proper divisors (40860116716).

51544221044 is a wasteful number, since it uses less digits than its factorization.

51544221044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797647 (or 1797645 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 32.

Adding to 51544221044 its reverse (44012244515), we get a palindrome (95556465559).

The spelling of 51544221044 in words is "fifty-one billion, five hundred forty-four million, two hundred twenty-one thousand, forty-four".