9481581005861 has 8 divisors (see below), whose sum is σ = 9544819534848. Its totient is φ = 9418484110000.

The previous prime is 9481581005789. The next prime is 9481581005909. The reversal of 9481581005861 is 1685001851849.

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

It is a cyclic number.

It is not a de Polignac number, because 9481581005861 - 2¹⁰ = 9481581004837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9481581005797 and 9481581005806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9481587005861) 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 in 7 ways as a sum of consecutive naturals, for example, 35273945 + ... + 35541726.

It is an arithmetic number, because the mean of its divisors is an integer number (1193102441856).

Almost surely, 2^{9481581005861} is an apocalyptic number.

It is an amenable number.

9481581005861 is a deficient number, since it is larger than the sum of its proper divisors (63238528987).

9481581005861 is a wasteful number, since it uses less digits than its factorization.

9481581005861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70816563.

The product of its (nonzero) digits is 2764800, while the sum is 56.

The spelling of 9481581005861 in words is "nine trillion, four hundred eighty-one billion, five hundred eighty-one million, five thousand, eight hundred sixty-one".