65146421069 has 2 divisors, whose sum is σ = 65146421070. Its totient is φ = 65146421068.

The previous prime is 65146421063. The next prime is 65146421083. The reversal of 65146421069 is 96012464156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36632046025 + 28514375044 = 191395^2 + 168862^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65146421069 is a prime.

It is a super-2 number, since 2×65146421069² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65146421063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32573210534 + 32573210535.

It is an arithmetic number, because the mean of its divisors is an integer number (32573210535).

Almost surely, 2^65146421069 is an apocalyptic number.

It is an amenable number.

65146421069 is a deficient number, since it is larger than the sum of its proper divisors (1).

65146421069 is an equidigital number, since it uses as much as digits as its factorization.

65146421069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 65146421069 in words is "sixty-five billion, one hundred forty-six million, four hundred twenty-one thousand, sixty-nine".