51555410244 has 36 divisors (see below), whose sum is σ = 140345284716. Its totient is φ = 15863203008.

The previous prime is 51555410233. The next prime is 51555410251. The reversal of 51555410244 is 44201455515.

51555410244 is a `hidden beast` number, since 51 + 5 + 554 + 10 + 2 + 44 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22464014400 + 29091395844 = 149880^2 + 170562^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 51555410199 and 51555410208.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 55080099 + ... + 55081034.

It is an arithmetic number, because the mean of its divisors is an integer number (3898480131).

Almost surely, 2^51555410244 is an apocalyptic number.

It is an amenable number.

51555410244 is an abundant number, since it is smaller than the sum of its proper divisors (88789874472).

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

51555410244 is a wasteful number, since it uses less digits than its factorization.

51555410244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110161156 (or 110161151 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

Adding to 51555410244 its reverse (44201455515), we get a palindrome (95756865759).

The spelling of 51555410244 in words is "fifty-one billion, five hundred fifty-five million, four hundred ten thousand, two hundred forty-four".