51425593489 has 2 divisors, whose sum is σ = 51425593490. Its totient is φ = 51425593488.

The previous prime is 51425593469. The next prime is 51425593517. The reversal of 51425593489 is 98439552415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38579637889 + 12845955600 = 196417^2 + 113340^2 .

It is a cyclic number.

It is not a de Polignac number, because 51425593489 - 2⁷ = 51425593361 is a prime.

It is not a weakly prime, because it can be changed into another prime (51425593409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25712796744 + 25712796745.

It is an arithmetic number, because the mean of its divisors is an integer number (25712796745).

Almost surely, 2^51425593489 is an apocalyptic number.

It is an amenable number.

51425593489 is a deficient number, since it is larger than the sum of its proper divisors (1).

51425593489 is an equidigital number, since it uses as much as digits as its factorization.

51425593489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776000, while the sum is 55.

The spelling of 51425593489 in words is "fifty-one billion, four hundred twenty-five million, five hundred ninety-three thousand, four hundred eighty-nine".