11662793480581 has 4 divisors (see below), whose sum is σ = 11678490376992. Its totient is φ = 11647096584172.

The previous prime is 11662793480579. The next prime is 11662793480621. The reversal of 11662793480581 is 18508439726611.

11662793480581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11662793480581 - 2¹ = 11662793480579 is a prime.

It is a super-2 number, since 2×11662793480581² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11662793480521) 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, 7848447091 + ... + 7848448576.

It is an arithmetic number, because the mean of its divisors is an integer number (2919622594248).

It is a 1-persistent number, because it is pandigital, but 2⋅11662793480581 = 23325586961162 is not.

Almost surely, 2^{11662793480581} is an apocalyptic number.

It is an amenable number.

11662793480581 is a deficient number, since it is larger than the sum of its proper divisors (15696896411).

11662793480581 is an equidigital number, since it uses as much as digits as its factorization.

11662793480581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15696896410.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 11662793480581 in words is "eleven trillion, six hundred sixty-two billion, seven hundred ninety-three million, four hundred eighty thousand, five hundred eighty-one".