11531411561 has 8 divisors (see below), whose sum is σ = 11591116800. Its totient is φ = 11471788080.

The previous prime is 11531411539. The next prime is 11531411687. The reversal of 11531411561 is 16511413511.

11531411561 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 a cyclic number.

It is not a de Polignac number, because 11531411561 - 2⁶ = 11531411497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11531411531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273206 + ... + 312576.

It is an arithmetic number, because the mean of its divisors is an integer number (1448889600).

Almost surely, 2^11531411561 is an apocalyptic number.

It is an amenable number.

11531411561 is a deficient number, since it is larger than the sum of its proper divisors (59705239).

11531411561 is a wasteful number, since it uses less digits than its factorization.

11531411561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40879.

The product of its digits is 1800, while the sum is 29.

The spelling of 11531411561 in words is "eleven billion, five hundred thirty-one million, four hundred eleven thousand, five hundred sixty-one".