11211507617 has 4 divisors (see below), whose sum is σ = 11229679236. Its totient is φ = 11193336000.

The previous prime is 11211507581. The next prime is 11211507679. The reversal of 11211507617 is 71670511211.

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 3175998736 + 8035508881 = 56356^2 + 89641^2 .

It is a cyclic number.

It is not a de Polignac number, because 11211507617 - 2²⁶ = 11144398753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211507317) by changing a digit.

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, 9084884 + ... + 9086117.

It is an arithmetic number, because the mean of its divisors is an integer number (2807419809).

Almost surely, 2^11211507617 is an apocalyptic number.

It is an amenable number.

11211507617 is a deficient number, since it is larger than the sum of its proper divisors (18171619).

11211507617 is an equidigital number, since it uses as much as digits as its factorization.

11211507617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18171618.

The product of its (nonzero) digits is 2940, while the sum is 32.

The spelling of 11211507617 in words is "eleven billion, two hundred eleven million, five hundred seven thousand, six hundred seventeen".