65023477709681 has 2 divisors, whose sum is σ = 65023477709682. Its totient is φ = 65023477709680.

The previous prime is 65023477709677. The next prime is 65023477709693. The reversal of 65023477709681 is 18690777432056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42599379312400 + 22424098397281 = 6526820^2 + 4735409^2 .

It is a cyclic number.

It is not a de Polignac number, because 65023477709681 - 2² = 65023477709677 is a prime.

It is a super-2 number, since 2×65023477709681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (65023477709581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32511738854840 + 32511738854841.

It is an arithmetic number, because the mean of its divisors is an integer number (32511738854841).

It is a 1-persistent number, because it is pandigital, but 2⋅65023477709681 = 130046955419362 is not.

Almost surely, 2^{65023477709681} is an apocalyptic number.

It is an amenable number.

65023477709681 is a deficient number, since it is larger than the sum of its proper divisors (1).

65023477709681 is an equidigital number, since it uses as much as digits as its factorization.

65023477709681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 106686720, while the sum is 65.

The spelling of 65023477709681 in words is "sixty-five trillion, twenty-three billion, four hundred seventy-seven million, seven hundred nine thousand, six hundred eighty-one".