12611003305 has 8 divisors (see below), whose sum is σ = 15140298312. Its totient is φ = 10084073088.

The previous prime is 12611003269. The next prime is 12611003309. The reversal of 12611003305 is 50330011621.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 296218521 + 12314784784 = 17211^2 + 110972^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12611003305 - 2¹³ = 12610995113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12611003309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579442 + ... + 600811.

It is an arithmetic number, because the mean of its divisors is an integer number (1892537289).

Almost surely, 2^12611003305 is an apocalyptic number.

It is an amenable number.

12611003305 is a deficient number, since it is larger than the sum of its proper divisors (2529295007).

12611003305 is a wasteful number, since it uses less digits than its factorization.

12611003305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182395.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 12611003305 its reverse (50330011621), we get a palindrome (62941014926).

The spelling of 12611003305 in words is "twelve billion, six hundred eleven million, three thousand, three hundred five".