65276788781 has 2 divisors, whose sum is σ = 65276788782. Its totient is φ = 65276788780.

The previous prime is 65276788777. The next prime is 65276788783. The reversal of 65276788781 is 18788767256.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62667111556 + 2609677225 = 250334^2 + 51085^2 .

It is a cyclic number.

It is not a de Polignac number, because 65276788781 - 2² = 65276788777 is a prime.

It is a super-2 number, since 2×65276788781² (a number of 22 digits) contains 22 as substring.

Together with 65276788783, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65276788783) 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, 32638394390 + 32638394391.

It is an arithmetic number, because the mean of its divisors is an integer number (32638394391).

Almost surely, 2^65276788781 is an apocalyptic number.

It is an amenable number.

65276788781 is a deficient number, since it is larger than the sum of its proper divisors (1).

65276788781 is an equidigital number, since it uses as much as digits as its factorization.

65276788781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63221760, while the sum is 65.

The spelling of 65276788781 in words is "sixty-five billion, two hundred seventy-six million, seven hundred eighty-eight thousand, seven hundred eighty-one".