10949561605 has 4 divisors (see below), whose sum is σ = 13139473932. Its totient is φ = 8759649280.

The previous prime is 10949561591. The next prime is 10949561633. The reversal of 10949561605 is 50616594901.

It is a happy number.

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 1500555169 + 9449006436 = 38737^2 + 97206^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10949561605 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1094956156 + ... + 1094956165.

It is an arithmetic number, because the mean of its divisors is an integer number (3284868483).

Almost surely, 2^10949561605 is an apocalyptic number.

It is an amenable number.

10949561605 is a deficient number, since it is larger than the sum of its proper divisors (2189912327).

10949561605 is an equidigital number, since it uses as much as digits as its factorization.

10949561605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189912326.

The product of its (nonzero) digits is 291600, while the sum is 46.

The spelling of 10949561605 in words is "ten billion, nine hundred forty-nine million, five hundred sixty-one thousand, six hundred five".