51561313541054 has 16 divisors (see below), whose sum is σ = 81521005966080. Its totient is φ = 24391258407000.

The previous prime is 51561313541021. The next prime is 51561313541063. The reversal of 51561313541054 is 45014531316515.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51561313540996 and 51561313541014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 903351404 + ... + 903408479.

It is an arithmetic number, because the mean of its divisors is an integer number (5095062872880).

Almost surely, 2^{51561313541054} is an apocalyptic number.

51561313541054 is a deficient number, since it is larger than the sum of its proper divisors (29959692425026).

51561313541054 is a wasteful number, since it uses less digits than its factorization.

51561313541054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806760655.

The product of its (nonzero) digits is 540000, while the sum is 44.

Adding to 51561313541054 its reverse (45014531316515), we get a palindrome (96575844857569).

The spelling of 51561313541054 in words is "fifty-one trillion, five hundred sixty-one billion, three hundred thirteen million, five hundred forty-one thousand, fifty-four".