11594778605 has 4 divisors (see below), whose sum is σ = 13913734332. Its totient is φ = 9275822880.

The previous prime is 11594778553. The next prime is 11594778647. The reversal of 11594778605 is 50687749511.

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 6422579881 + 5172198724 = 80141^2 + 71918^2 .

It is not a de Polignac number, because 11594778605 - 2¹² = 11594774509 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1159477856 + ... + 1159477865.

It is an arithmetic number, because the mean of its divisors is an integer number (3478433583).

Almost surely, 2^11594778605 is an apocalyptic number.

It is an amenable number.

11594778605 is a deficient number, since it is larger than the sum of its proper divisors (2318955727).

11594778605 is an equidigital number, since it uses as much as digits as its factorization.

11594778605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318955726.

The product of its (nonzero) digits is 2116800, while the sum is 53.

The spelling of 11594778605 in words is "eleven billion, five hundred ninety-four million, seven hundred seventy-eight thousand, six hundred five".