9618961799 has 2 divisors, whose sum is σ = 9618961800. Its totient is φ = 9618961798.

The previous prime is 9618961771. The next prime is 9618961829. The reversal of 9618961799 is 9971698169.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9618961799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9618969799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4809480899 + 4809480900.

It is an arithmetic number, because the mean of its divisors is an integer number (4809480900).

Almost surely, 2^9618961799 is an apocalyptic number.

9618961799 is a deficient number, since it is larger than the sum of its proper divisors (1).

9618961799 is an equidigital number, since it uses as much as digits as its factorization.

9618961799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13226976, while the sum is 65.

The square root of 9618961799 is about 98076.3060020105. The cubic root of 9618961799 is about 2126.7155179563.

The spelling of 9618961799 in words is "nine billion, six hundred eighteen million, nine hundred sixty-one thousand, seven hundred ninety-nine".