11108640261 has 4 divisors (see below), whose sum is σ = 14811520352. Its totient is φ = 7405760172.

The previous prime is 11108640247. The next prime is 11108640313. The reversal of 11108640261 is 16204680111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11108640261 - 2²³ = 11100251653 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11108640761) 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, 1851440041 + ... + 1851440046.

It is an arithmetic number, because the mean of its divisors is an integer number (3702880088).

Almost surely, 2^11108640261 is an apocalyptic number.

It is an amenable number.

11108640261 is a deficient number, since it is larger than the sum of its proper divisors (3702880091).

11108640261 is an equidigital number, since it uses as much as digits as its factorization.

11108640261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702880090.

The product of its (nonzero) digits is 2304, while the sum is 30.

The spelling of 11108640261 in words is "eleven billion, one hundred eight million, six hundred forty thousand, two hundred sixty-one".