9917804342527 has 2 divisors, whose sum is σ = 9917804342528. Its totient is φ = 9917804342526.

The previous prime is 9917804342437. The next prime is 9917804342581. The reversal of 9917804342527 is 7252434087199.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9917804342527 - 2²⁷ = 9917670124799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9917804342587) 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, 4958902171263 + 4958902171264.

It is an arithmetic number, because the mean of its divisors is an integer number (4958902171264).

Almost surely, 2^{9917804342527} is an apocalyptic number.

9917804342527 is a deficient number, since it is larger than the sum of its proper divisors (1).

9917804342527 is an equidigital number, since it uses as much as digits as its factorization.

9917804342527 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 9917804342527 in words is "nine trillion, nine hundred seventeen billion, eight hundred four million, three hundred forty-two thousand, five hundred twenty-seven".