61366426117 has 2 divisors, whose sum is σ = 61366426118. Its totient is φ = 61366426116.

The previous prime is 61366426087. The next prime is 61366426129. The reversal of 61366426117 is 71162466316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61263180196 + 103245921 = 247514^2 + 10161^2 .

It is a cyclic number.

It is not a de Polignac number, because 61366426117 - 2¹⁵ = 61366393349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61366426417) 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, 30683213058 + 30683213059.

It is an arithmetic number, because the mean of its divisors is an integer number (30683213059).

Almost surely, 2^61366426117 is an apocalyptic number.

It is an amenable number.

61366426117 is a deficient number, since it is larger than the sum of its proper divisors (1).

61366426117 is an equidigital number, since it uses as much as digits as its factorization.

61366426117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 43.

The spelling of 61366426117 in words is "sixty-one billion, three hundred sixty-six million, four hundred twenty-six thousand, one hundred seventeen".