11007509581681 has 4 divisors (see below), whose sum is σ = 11017543775652. Its totient is φ = 10997475387712.

The previous prime is 11007509581669. The next prime is 11007509581687. The reversal of 11007509581681 is 18618590570011.

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 8101879104400 + 2905630477281 = 2846380^2 + 1704591^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11007509581681 is a prime.

It is a super-2 number, since 2×11007509581681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11007509581687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5017095340 + ... + 5017097533.

It is an arithmetic number, because the mean of its divisors is an integer number (2754385943913).

Almost surely, 2^{11007509581681} is an apocalyptic number.

It is an amenable number.

11007509581681 is a deficient number, since it is larger than the sum of its proper divisors (10034193971).

11007509581681 is a wasteful number, since it uses less digits than its factorization.

11007509581681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10034193970.

The product of its (nonzero) digits is 604800, while the sum is 52.

The spelling of 11007509581681 in words is "eleven trillion, seven billion, five hundred nine million, five hundred eighty-one thousand, six hundred eighty-one".