51266257673 has 2 divisors, whose sum is σ = 51266257674. Its totient is φ = 51266257672.

The previous prime is 51266257613. The next prime is 51266257741. The reversal of 51266257673 is 37675266215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40349560384 + 10916697289 = 200872^2 + 104483^2 .

It is a cyclic number.

It is not a de Polignac number, because 51266257673 - 2¹⁰ = 51266256649 is a prime.

It is not a weakly prime, because it can be changed into another prime (51266257613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25633128836 + 25633128837.

It is an arithmetic number, because the mean of its divisors is an integer number (25633128837).

Almost surely, 2^51266257673 is an apocalyptic number.

It is an amenable number.

51266257673 is a deficient number, since it is larger than the sum of its proper divisors (1).

51266257673 is an equidigital number, since it uses as much as digits as its factorization.

51266257673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3175200, while the sum is 50.

The spelling of 51266257673 in words is "fifty-one billion, two hundred sixty-six million, two hundred fifty-seven thousand, six hundred seventy-three".