11509643417 has 4 divisors (see below), whose sum is σ = 12010062720. Its totient is φ = 11009224116.

The previous prime is 11509643381. The next prime is 11509643423. The reversal of 11509643417 is 71434690511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71434690511 = 131 ⋅545302981.

It is a cyclic number.

It is not a de Polignac number, because 11509643417 - 2²⁰ = 11508594841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11509643617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250209617 + ... + 250209662.

It is an arithmetic number, because the mean of its divisors is an integer number (3002515680).

Almost surely, 2^11509643417 is an apocalyptic number.

It is an amenable number.

11509643417 is a deficient number, since it is larger than the sum of its proper divisors (500419303).

11509643417 is an equidigital number, since it uses as much as digits as its factorization.

11509643417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500419302.

The product of its (nonzero) digits is 90720, while the sum is 41.

The spelling of 11509643417 in words is "eleven billion, five hundred nine million, six hundred forty-three thousand, four hundred seventeen".