51086518480181 has 2 divisors, whose sum is σ = 51086518480182. Its totient is φ = 51086518480180.

The previous prime is 51086518480169. The next prime is 51086518480211. The reversal of 51086518480181 is 18108481568015.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49099926893956 + 1986591586225 = 7007134^2 + 1409465^2 .

It is a cyclic number.

It is not a de Polignac number, because 51086518480181 - 2⁶ = 51086518480117 is a prime.

It is a super-2 number, since 2×51086518480181² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51086518486181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25543259240090 + 25543259240091.

It is an arithmetic number, because the mean of its divisors is an integer number (25543259240091).

Almost surely, 2^{51086518480181} is an apocalyptic number.

It is an amenable number.

51086518480181 is a deficient number, since it is larger than the sum of its proper divisors (1).

51086518480181 is an equidigital number, since it uses as much as digits as its factorization.

51086518480181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2457600, while the sum is 56.

The spelling of 51086518480181 in words is "fifty-one trillion, eighty-six billion, five hundred eighteen million, four hundred eighty thousand, one hundred eighty-one".