11861103620085 has 32 divisors (see below), whose sum is σ = 19803853762560. Its totient is φ = 6050586155328.

The previous prime is 11861103620083. The next prime is 11861103620137. The reversal of 11861103620085 is 58002630116811.

It is not a de Polignac number, because 11861103620085 - 2¹ = 11861103620083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11861103620083) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6318382 + ... + 7977728.

It is an arithmetic number, because the mean of its divisors is an integer number (618870430080).

Almost surely, 2^{11861103620085} is an apocalyptic number.

11861103620085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11861103620085 is a deficient number, since it is larger than the sum of its proper divisors (7942750142475).

11861103620085 is a wasteful number, since it uses less digits than its factorization.

11861103620085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680097.

The product of its (nonzero) digits is 69120, while the sum is 42.

Adding to 11861103620085 its reverse (58002630116811), we get a palindrome (69863733736896).

The spelling of 11861103620085 in words is "eleven trillion, eight hundred sixty-one billion, one hundred three million, six hundred twenty thousand, eighty-five".