9618940414991 has 2 divisors, whose sum is σ = 9618940414992. Its totient is φ = 9618940414990.

The previous prime is 9618940414969. The next prime is 9618940415027. The reversal of 9618940414991 is 1994140498169.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9618940414991 - 2¹⁴ = 9618940398607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9618940414591) 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, 4809470207495 + 4809470207496.

It is an arithmetic number, because the mean of its divisors is an integer number (4809470207496).

Almost surely, 2^{9618940414991} is an apocalyptic number.

9618940414991 is a deficient number, since it is larger than the sum of its proper divisors (1).

9618940414991 is an equidigital number, since it uses as much as digits as its factorization.

9618940414991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20155392, while the sum is 65.

The spelling of 9618940414991 in words is "nine trillion, six hundred eighteen billion, nine hundred forty million, four hundred fourteen thousand, nine hundred ninety-one".