51225546661699 has 2 divisors, whose sum is σ = 51225546661700. Its totient is φ = 51225546661698.

The previous prime is 51225546661571. The next prime is 51225546661727. The reversal of 51225546661699 is 99616664552215.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51225546661699 - 2⁷ = 51225546661571 is a prime.

It is not a weakly prime, because it can be changed into another prime (51225546671699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25612773330849 + 25612773330850.

It is an arithmetic number, because the mean of its divisors is an integer number (25612773330850).

Almost surely, 2^{51225546661699} is an apocalyptic number.

51225546661699 is a deficient number, since it is larger than the sum of its proper divisors (1).

51225546661699 is an equidigital number, since it uses as much as digits as its factorization.

51225546661699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952000, while the sum is 67.

The spelling of 51225546661699 in words is "fifty-one trillion, two hundred twenty-five billion, five hundred forty-six million, six hundred sixty-one thousand, six hundred ninety-nine".