51266635265563 has 16 divisors (see below), whose sum is σ = 54177533614080. Its totient is φ = 48412672060896.

The previous prime is 51266635265561. The next prime is 51266635265581. The reversal of 51266635265563 is 36556253666215.

51266635265563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51266635265563 - 2¹ = 51266635265561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51266635265561) 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 15 ways as a sum of consecutive naturals, for example, 19566781 + ... + 22031617.

It is an arithmetic number, because the mean of its divisors is an integer number (3386095850880).

Almost surely, 2^{51266635265563} is an apocalyptic number.

51266635265563 is a deficient number, since it is larger than the sum of its proper divisors (2910898348517).

51266635265563 is a wasteful number, since it uses less digits than its factorization.

51266635265563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476386.

The product of its digits is 174960000, while the sum is 61.

The spelling of 51266635265563 in words is "fifty-one trillion, two hundred sixty-six billion, six hundred thirty-five million, two hundred sixty-five thousand, five hundred sixty-three".