11611205660671 has 4 divisors (see below), whose sum is σ = 11611220545600. Its totient is φ = 11611190775744.

The previous prime is 11611205660653. The next prime is 11611205660693. The reversal of 11611205660671 is 17606650211611.

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

It is a cyclic number.

It is not a de Polignac number, because 11611205660671 - 2¹¹ = 11611205658623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11611205630671) 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, 6203631 + ... + 7855408.

It is an arithmetic number, because the mean of its divisors is an integer number (2902805136400).

Almost surely, 2^{11611205660671} is an apocalyptic number.

11611205660671 is a deficient number, since it is larger than the sum of its proper divisors (14884929).

11611205660671 is an equidigital number, since it uses as much as digits as its factorization.

11611205660671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14884928.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 11611205660671 in words is "eleven trillion, six hundred eleven billion, two hundred five million, six hundred sixty thousand, six hundred seventy-one".