9855971659 has 2 divisors, whose sum is σ = 9855971660. Its totient is φ = 9855971658.

The previous prime is 9855971641. The next prime is 9855971687. The reversal of 9855971659 is 9561795589.

9855971659 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9855971659 - 2²³ = 9847583051 is a prime.

It is a super-2 number, since 2×9855971659² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9855971659.

It is not a weakly prime, because it can be changed into another prime (9855971159) 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, 4927985829 + 4927985830.

It is an arithmetic number, because the mean of its divisors is an integer number (4927985830).

Almost surely, 2^9855971659 is an apocalyptic number.

9855971659 is a deficient number, since it is larger than the sum of its proper divisors (1).

9855971659 is an equidigital number, since it uses as much as digits as its factorization.

9855971659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30618000, while the sum is 64.

The square root of 9855971659 is about 99277.2464313953. The cubic root of 9855971659 is about 2144.0413093134.

The spelling of 9855971659 in words is "nine billion, eight hundred fifty-five million, nine hundred seventy-one thousand, six hundred fifty-nine".