51111434163 has 16 divisors (see below), whose sum is σ = 70522077600. Its totient is φ = 32888325120.

The previous prime is 51111434149. The next prime is 51111434173. The reversal of 51111434163 is 36143411115.

It is not a de Polignac number, because 51111434163 - 2⁵ = 51111434131 is a prime.

It is a super-2 number, since 2×51111434163² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51111434163.

It is not an unprimeable number, because it can be changed into a prime (51111434173) 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, 167973 + ... + 361161.

It is an arithmetic number, because the mean of its divisors is an integer number (4407629850).

Almost surely, 2^51111434163 is an apocalyptic number.

51111434163 is a deficient number, since it is larger than the sum of its proper divisors (19410643437).

51111434163 is a wasteful number, since it uses less digits than its factorization.

51111434163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196262.

The product of its digits is 4320, while the sum is 30.

Adding to 51111434163 its reverse (36143411115), we get a palindrome (87254845278).

The spelling of 51111434163 in words is "fifty-one billion, one hundred eleven million, four hundred thirty-four thousand, one hundred sixty-three".