12611005705 has 16 divisors (see below), whose sum is σ = 16414214544. Its totient is φ = 9263749120.

The previous prime is 12611005703. The next prime is 12611005709. The reversal of 12611005705 is 50750011621.

It can be written as a sum of positive squares in 8 ways, for example, as 21492496 + 12589513209 = 4636^2 + 112203^2 .

It is not a de Polignac number, because 12611005705 - 2¹ = 12611005703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12611005703) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1805842 + ... + 1812811.

It is an arithmetic number, because the mean of its divisors is an integer number (1025888409).

Almost surely, 2^12611005705 is an apocalyptic number.

It is an amenable number.

12611005705 is a deficient number, since it is larger than the sum of its proper divisors (3803208839).

12611005705 is a wasteful number, since it uses less digits than its factorization.

12611005705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3618716.

The product of its (nonzero) digits is 2100, while the sum is 28.

The spelling of 12611005705 in words is "twelve billion, six hundred eleven million, five thousand, seven hundred five".