11279518417 has 2 divisors, whose sum is σ = 11279518418. Its totient is φ = 11279518416.

The previous prime is 11279518381. The next prime is 11279518433. The reversal of 11279518417 is 71481597211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8080032321 + 3199486096 = 89889^2 + 56564^2 .

It is a cyclic number.

It is not a de Polignac number, because 11279518417 - 2²⁷ = 11145300689 is a prime.

It is not a weakly prime, because it can be changed into another prime (11279518457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5639759208 + 5639759209.

It is an arithmetic number, because the mean of its divisors is an integer number (5639759209).

Almost surely, 2^11279518417 is an apocalyptic number.

It is an amenable number.

11279518417 is a deficient number, since it is larger than the sum of its proper divisors (1).

11279518417 is an equidigital number, since it uses as much as digits as its factorization.

11279518417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 46.

The spelling of 11279518417 in words is "eleven billion, two hundred seventy-nine million, five hundred eighteen thousand, four hundred seventeen".