9999863726161 has 8 divisors (see below), whose sum is σ = 10678386182400. Its totient is φ = 9343587907920.

The previous prime is 9999863726143. The next prime is 9999863726201. The reversal of 9999863726161 is 1616273689999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-9999863726161 is a prime.

It is a super-3 number, since 3×9999863726161³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (9999863726101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5561658571 + ... + 5561660368.

It is an arithmetic number, because the mean of its divisors is an integer number (1334798272800).

Almost surely, 2^{9999863726161} is an apocalyptic number.

It is an amenable number.

9999863726161 is a deficient number, since it is larger than the sum of its proper divisors (678522456239).

9999863726161 is a wasteful number, since it uses less digits than its factorization.

9999863726161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11123318999.

The product of its digits is 476171136, while the sum is 76.

The spelling of 9999863726161 in words is "nine trillion, nine hundred ninety-nine billion, eight hundred sixty-three million, seven hundred twenty-six thousand, one hundred sixty-one".