11855644655811 has 16 divisors (see below), whose sum is σ = 17839214530560. Its totient is φ = 6937472316320.

The previous prime is 11855644655779. The next prime is 11855644655831.

11855644655811 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 11855644655811 - 2⁵ = 11855644655779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11855644655831) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6194170755 + ... + 6194172668.

It is an arithmetic number, because the mean of its divisors is an integer number (1114950908160).

Almost surely, 2^{11855644655811} is an apocalyptic number.

11855644655811 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11855644655811 is a deficient number, since it is larger than the sum of its proper divisors (5983569874749).

11855644655811 is a wasteful number, since it uses less digits than its factorization.

11855644655811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12388343466.

The product of its digits is 23040000, while the sum is 60.

The spelling of 11855644655811 in words is "eleven trillion, eight hundred fifty-five billion, six hundred forty-four million, six hundred fifty-five thousand, eight hundred eleven".