51682116877 has 4 divisors (see below), whose sum is σ = 51949900060. Its totient is φ = 51414333696.

The previous prime is 51682116859. The next prime is 51682116919. The reversal of 51682116877 is 77861128615.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23904561321 + 27777555556 = 154611^2 + 166666^2 .

It is a cyclic number.

It is not a de Polignac number, because 51682116877 - 2¹⁵ = 51682084109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51682116377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133891302 + ... + 133891687.

It is an arithmetic number, because the mean of its divisors is an integer number (12987475015).

Almost surely, 2^51682116877 is an apocalyptic number.

It is an amenable number.

51682116877 is a deficient number, since it is larger than the sum of its proper divisors (267783183).

51682116877 is a wasteful number, since it uses less digits than its factorization.

51682116877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267783182.

The product of its digits is 1128960, while the sum is 52.

The spelling of 51682116877 in words is "fifty-one billion, six hundred eighty-two million, one hundred sixteen thousand, eight hundred seventy-seven".