51011055060561 has 12 divisors (see below), whose sum is σ = 73708940955780. Its totient is φ = 33995228870400.

The previous prime is 51011055060521. The next prime is 51011055060587. The reversal of 51011055060561 is 16506055011015.

It is a happy number.

51011055060561 is a `hidden beast` number, since 51 + 0 + 1 + 1 + 0 + 550 + 6 + 0 + 56 + 1 = 666.

51011055060561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11906743878225 + 39104311182336 = 3450615^2 + 6253344^2 .

It is not a de Polignac number, because 51011055060561 - 2²³ = 51011046671953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51011055060521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1011737556 + ... + 1011787973.

It is an arithmetic number, because the mean of its divisors is an integer number (6142411746315).

Almost surely, 2^{51011055060561} is an apocalyptic number.

It is an amenable number.

51011055060561 is a deficient number, since it is larger than the sum of its proper divisors (22697885895219).

51011055060561 is a wasteful number, since it uses less digits than its factorization.

51011055060561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023528336 (or 2023528333 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 51011055060561 in words is "fifty-one trillion, eleven billion, fifty-five million, sixty thousand, five hundred sixty-one".