65312543641 has 2 divisors, whose sum is σ = 65312543642. Its totient is φ = 65312543640.

The previous prime is 65312543603. The next prime is 65312543687. The reversal of 65312543641 is 14634521356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45830246400 + 19482297241 = 214080^2 + 139579^2 .

It is a cyclic number.

It is not a de Polignac number, because 65312543641 - 2¹⁷ = 65312412569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65312543594 and 65312543603.

It is not a weakly prime, because it can be changed into another prime (65312543141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32656271820 + 32656271821.

It is an arithmetic number, because the mean of its divisors is an integer number (32656271821).

Almost surely, 2^65312543641 is an apocalyptic number.

It is an amenable number.

65312543641 is a deficient number, since it is larger than the sum of its proper divisors (1).

65312543641 is an equidigital number, since it uses as much as digits as its factorization.

65312543641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 40.

The spelling of 65312543641 in words is "sixty-five billion, three hundred twelve million, five hundred forty-three thousand, six hundred forty-one".