10989717336985 has 4 divisors (see below), whose sum is σ = 13187660804388. Its totient is φ = 8791773869584.

The previous prime is 10989717336971. The next prime is 10989717337007. The reversal of 10989717336985 is 58963371798901.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5041713381376 + 5948003955609 = 2245376^2 + 2438853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10989717336985 is a prime.

It is a Smith number, since the sum of its digits (76) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1098971733694 + ... + 1098971733703.

It is an arithmetic number, because the mean of its divisors is an integer number (3296915201097).

Almost surely, 2^{10989717336985} is an apocalyptic number.

It is an amenable number.

10989717336985 is a deficient number, since it is larger than the sum of its proper divisors (2197943467403).

10989717336985 is an equidigital number, since it uses as much as digits as its factorization.

10989717336985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197943467402.

The product of its (nonzero) digits is 617258880, while the sum is 76.

The spelling of 10989717336985 in words is "ten trillion, nine hundred eighty-nine billion, seven hundred seventeen million, three hundred thirty-six thousand, nine hundred eighty-five".