51086518480061 has 2 divisors, whose sum is σ = 51086518480062. Its totient is φ = 51086518480060.

The previous prime is 51086518480027. The next prime is 51086518480097. The reversal of 51086518480061 is 16008481568015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49019335907161 + 2067182572900 = 7001381^2 + 1437770^2 .

It is a cyclic number.

It is not a de Polignac number, because 51086518480061 - 2³⁴ = 51069338610877 is a prime.

It is a super-2 number, since 2×51086518480061² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51086518479985 and 51086518480012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51086518480021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25543259240030 + 25543259240031.

It is an arithmetic number, because the mean of its divisors is an integer number (25543259240031).

Almost surely, 2^{51086518480061} is an apocalyptic number.

It is an amenable number.

51086518480061 is a deficient number, since it is larger than the sum of its proper divisors (1).

51086518480061 is an equidigital number, since it uses as much as digits as its factorization.

51086518480061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1843200, while the sum is 53.

The spelling of 51086518480061 in words is "fifty-one trillion, eighty-six billion, five hundred eighteen million, four hundred eighty thousand, sixty-one".