11516610641 has 4 divisors (see below), whose sum is σ = 11536851300. Its totient is φ = 11496369984.

The previous prime is 11516610631. The next prime is 11516610649. The reversal of 11516610641 is 14601661511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1142169616 + 10374441025 = 33796^2 + 101855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11516610641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11516610598 and 11516610607.

It is not an unprimeable number, because it can be changed into a prime (11516610649) 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, 10119476 + ... + 10120613.

It is an arithmetic number, because the mean of its divisors is an integer number (2884212825).

Almost surely, 2^11516610641 is an apocalyptic number.

It is an amenable number.

11516610641 is a deficient number, since it is larger than the sum of its proper divisors (20240659).

11516610641 is an equidigital number, since it uses as much as digits as its factorization.

11516610641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20240658.

The product of its (nonzero) digits is 4320, while the sum is 32.

The spelling of 11516610641 in words is "eleven billion, five hundred sixteen million, six hundred ten thousand, six hundred forty-one".