11681144149 has 2 divisors, whose sum is σ = 11681144150. Its totient is φ = 11681144148.

The previous prime is 11681144119. The next prime is 11681144161. The reversal of 11681144149 is 94144118611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10385648100 + 1295496049 = 101910^2 + 35993^2 .

It is an emirp because it is prime and its reverse (94144118611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11681144149 - 2¹⁷ = 11681013077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11681144119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5840572074 + 5840572075.

It is an arithmetic number, because the mean of its divisors is an integer number (5840572075).

Almost surely, 2^11681144149 is an apocalyptic number.

It is an amenable number.

11681144149 is a deficient number, since it is larger than the sum of its proper divisors (1).

11681144149 is an equidigital number, since it uses as much as digits as its factorization.

11681144149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 40.

The spelling of 11681144149 in words is "eleven billion, six hundred eighty-one million, one hundred forty-four thousand, one hundred forty-nine".