11661165006549 has 8 divisors (see below), whose sum is σ = 15548248264320. Its totient is φ = 7774095876576.

The previous prime is 11661165006527. The next prime is 11661165006581. The reversal of 11661165006549 is 94560056116611.

11661165006549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11661165006549 - 2²¹ = 11661162909397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661165006649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1426744 + ... + 5035665.

It is an arithmetic number, because the mean of its divisors is an integer number (1943531033040).

Almost surely, 2^{11661165006549} is an apocalyptic number.

It is an amenable number.

11661165006549 is a deficient number, since it is larger than the sum of its proper divisors (3887083257771).

11661165006549 is an equidigital number, since it uses as much as digits as its factorization.

11661165006549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7063899.

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 11661165006549 in words is "eleven trillion, six hundred sixty-one billion, one hundred sixty-five million, six thousand, five hundred forty-nine".