11461040561 has 16 divisors (see below), whose sum is σ = 12079250304. Its totient is φ = 10860562944.

The previous prime is 11461040537. The next prime is 11461040609. The reversal of 11461040561 is 16504016411.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 11461040561 - 2³⁰ = 10387298737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11461000561) 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, 551420 + ... + 571826.

It is an arithmetic number, because the mean of its divisors is an integer number (754953144).

Almost surely, 2^11461040561 is an apocalyptic number.

It is an amenable number.

11461040561 is a deficient number, since it is larger than the sum of its proper divisors (618209743).

11461040561 is a wasteful number, since it uses less digits than its factorization.

11461040561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20840.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 11461040561 its reverse (16504016411), we get a palindrome (27965056972).

The spelling of 11461040561 in words is "eleven billion, four hundred sixty-one million, forty thousand, five hundred sixty-one".