65785420313 has 2 divisors, whose sum is σ = 65785420314. Its totient is φ = 65785420312.

The previous prime is 65785420307. The next prime is 65785420331. The reversal of 65785420313 is 31302458756.

Together with next prime (65785420331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44153776384 + 21631643929 = 210128^2 + 147077^2 .

It is a cyclic number.

It is not a de Polignac number, because 65785420313 - 2¹² = 65785416217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (65785420343) 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, 32892710156 + 32892710157.

It is an arithmetic number, because the mean of its divisors is an integer number (32892710157).

Almost surely, 2^65785420313 is an apocalyptic number.

It is an amenable number.

65785420313 is a deficient number, since it is larger than the sum of its proper divisors (1).

65785420313 is an equidigital number, since it uses as much as digits as its factorization.

65785420313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 604800, while the sum is 44.

The spelling of 65785420313 in words is "sixty-five billion, seven hundred eighty-five million, four hundred twenty thousand, three hundred thirteen".