65136563669 has 2 divisors, whose sum is σ = 65136563670. Its totient is φ = 65136563668.

The previous prime is 65136563603. The next prime is 65136563683. The reversal of 65136563669 is 96636563156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49678614769 + 15457948900 = 222887^2 + 124330^2 .

It is a cyclic number.

It is not a de Polignac number, because 65136563669 - 2⁸ = 65136563413 is a prime.

It is a super-2 number, since 2×65136563669² (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 (65136563269) 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, 32568281834 + 32568281835.

It is an arithmetic number, because the mean of its divisors is an integer number (32568281835).

Almost surely, 2^65136563669 is an apocalyptic number.

It is an amenable number.

65136563669 is a deficient number, since it is larger than the sum of its proper divisors (1).

65136563669 is an equidigital number, since it uses as much as digits as its factorization.

65136563669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15746400, while the sum is 56.

The spelling of 65136563669 in words is "sixty-five billion, one hundred thirty-six million, five hundred sixty-three thousand, six hundred sixty-nine".