61641288989317 has 2 divisors, whose sum is σ = 61641288989318. Its totient is φ = 61641288989316.

The previous prime is 61641288989237. The next prime is 61641288989339. The reversal of 61641288989317 is 71398988214616.

61641288989317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36343547730721 + 25297741258596 = 6028561^2 + 5029686^2 .

It is a cyclic number.

It is not a de Polignac number, because 61641288989317 - 2²⁷ = 61641154771589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61641288989317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61641288980317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30820644494658 + 30820644494659.

It is an arithmetic number, because the mean of its divisors is an integer number (30820644494659).

Almost surely, 2^{61641288989317} is an apocalyptic number.

It is an amenable number.

61641288989317 is a deficient number, since it is larger than the sum of its proper divisors (1).

61641288989317 is an equidigital number, since it uses as much as digits as its factorization.

61641288989317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 250822656, while the sum is 73.

The spelling of 61641288989317 in words is "sixty-one trillion, six hundred forty-one billion, two hundred eighty-eight million, nine hundred eighty-nine thousand, three hundred seventeen".