51354128788709 has 2 divisors, whose sum is σ = 51354128788710. Its totient is φ = 51354128788708.

The previous prime is 51354128788693. The next prime is 51354128788783. The reversal of 51354128788709 is 90788782145315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41093830739809 + 10260298048900 = 6410447^2 + 3203170^2 .

It is a cyclic number.

It is not a de Polignac number, because 51354128788709 - 2⁴ = 51354128788693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51354128784709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25677064394354 + 25677064394355.

It is an arithmetic number, because the mean of its divisors is an integer number (25677064394355).

Almost surely, 2^{51354128788709} is an apocalyptic number.

It is an amenable number.

51354128788709 is a deficient number, since it is larger than the sum of its proper divisors (1).

51354128788709 is an equidigital number, since it uses as much as digits as its factorization.

51354128788709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 135475200, while the sum is 68.

The spelling of 51354128788709 in words is "fifty-one trillion, three hundred fifty-four billion, one hundred twenty-eight million, seven hundred eighty-eight thousand, seven hundred nine".