10949561611 has 4 divisors (see below), whose sum is σ = 10956613752.
Its totient is φ = 10942509472.
The previous prime is 10949561591. The next prime is 10949561633. The reversal of 10949561611 is 11616594901.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 10949561611 - 29 = 10949561099 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (10949561411) 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, 3523741 + ... + 3526846.
It is an arithmetic number, because the mean of its divisors is an integer number (2739153438).
Almost surely, 210949561611 is an apocalyptic number.
10949561611 is a deficient number, since it is larger than the sum of its proper divisors (7052141).
10949561611 is an equidigital number, since it uses as much as digits as its factorization.
10949561611 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 7052140.
The product of its (nonzero) digits is 58320, while the sum is 43.
The spelling of 10949561611 in words is "ten billion, nine hundred forty-nine million, five hundred sixty-one thousand, six hundred eleven".