61634108320489 has 2 divisors, whose sum is σ = 61634108320490. Its totient is φ = 61634108320488.

The previous prime is 61634108320457. The next prime is 61634108320501. The reversal of 61634108320489 is 98402380143616.

61634108320489 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., 51788288102464 + 9845820218025 = 7196408^2 + 3137805^2 .

It is a cyclic number.

It is not a de Polignac number, because 61634108320489 - 2⁵ = 61634108320457 is a prime.

It is not a weakly prime, because it can be changed into another prime (61634108320429) 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, 30817054160244 + 30817054160245.

It is an arithmetic number, because the mean of its divisors is an integer number (30817054160245).

Almost surely, 2^{61634108320489} is an apocalyptic number.

It is an amenable number.

61634108320489 is a deficient number, since it is larger than the sum of its proper divisors (1).

61634108320489 is an equidigital number, since it uses as much as digits as its factorization.

61634108320489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 61634108320489 in words is "sixty-one trillion, six hundred thirty-four billion, one hundred eight million, three hundred twenty thousand, four hundred eighty-nine".