51118868148877 has 2 divisors, whose sum is σ = 51118868148878. Its totient is φ = 51118868148876.

The previous prime is 51118868148841. The next prime is 51118868148911. The reversal of 51118868148877 is 77884186881115.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43831735266916 + 7287132881961 = 6620554^2 + 2699469^2 .

It is a cyclic number.

It is not a de Polignac number, because 51118868148877 - 2¹⁵ = 51118868116109 is a prime.

It is a super-2 number, since 2×51118868148877² (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 (51118868178877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25559434074438 + 25559434074439.

It is an arithmetic number, because the mean of its divisors is an integer number (25559434074439).

Almost surely, 2^{51118868148877} is an apocalyptic number.

It is an amenable number.

51118868148877 is a deficient number, since it is larger than the sum of its proper divisors (1).

51118868148877 is an equidigital number, since it uses as much as digits as its factorization.

51118868148877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192675840, while the sum is 73.

The spelling of 51118868148877 in words is "fifty-one trillion, one hundred eighteen billion, eight hundred sixty-eight million, one hundred forty-eight thousand, eight hundred seventy-seven".