51086518479977 has 4 divisors (see below), whose sum is σ = 51091332070020. Its totient is φ = 51081704889936.

The previous prime is 51086518479863. The next prime is 51086518480007. The reversal of 51086518479977 is 77997481568015.

51086518479977 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 42504806024041 + 8581712455936 = 6519571^2 + 2929456^2 .

It is a cyclic number.

It is not a de Polignac number, because 51086518479977 - 2²⁰ = 51086517431401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51086518479898 and 51086518479907.

It is not an unprimeable number, because it can be changed into a prime (51086518479077) 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 3 ways as a sum of consecutive naturals, for example, 2406779102 + ... + 2406800327.

It is an arithmetic number, because the mean of its divisors is an integer number (12772833017505).

Almost surely, 2^{51086518479977} is an apocalyptic number.

It is an amenable number.

51086518479977 is a deficient number, since it is larger than the sum of its proper divisors (4813590043).

51086518479977 is a wasteful number, since it uses less digits than its factorization.

51086518479977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4813590042.

The product of its (nonzero) digits is 1066867200, while the sum is 77.

The spelling of 51086518479977 in words is "fifty-one trillion, eighty-six billion, five hundred eighteen million, four hundred seventy-nine thousand, nine hundred seventy-seven".