51326055654509 has 2 divisors, whose sum is σ = 51326055654510. Its totient is φ = 51326055654508.

The previous prime is 51326055654487. The next prime is 51326055654547. The reversal of 51326055654509 is 90545655062315.

51326055654509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42838464912100 + 8487590742409 = 6545110^2 + 2913347^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51326055654509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51326055624509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25663027827254 + 25663027827255.

It is an arithmetic number, because the mean of its divisors is an integer number (25663027827255).

Almost surely, 2^{51326055654509} is an apocalyptic number.

It is an amenable number.

51326055654509 is a deficient number, since it is larger than the sum of its proper divisors (1).

51326055654509 is an equidigital number, since it uses as much as digits as its factorization.

51326055654509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24300000, while the sum is 56.

The spelling of 51326055654509 in words is "fifty-one trillion, three hundred twenty-six billion, fifty-five million, six hundred fifty-four thousand, five hundred nine".