11245111668509 has 4 divisors (see below), whose sum is σ = 11247343289280. Its totient is φ = 11242880047740.

The previous prime is 11245111668499. The next prime is 11245111668517. The reversal of 11245111668509 is 90586611154211.

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.

It is a cyclic number.

It is not a de Polignac number, because 11245111668509 - 2⁴⁰ = 10145600040733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11245111668589) 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, 1115802827 + ... + 1115812904.

It is an arithmetic number, because the mean of its divisors is an integer number (2811835822320).

Almost surely, 2^{11245111668509} is an apocalyptic number.

It is an amenable number.

11245111668509 is a deficient number, since it is larger than the sum of its proper divisors (2231620771).

11245111668509 is an equidigital number, since it uses as much as digits as its factorization.

11245111668509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231620770.

The product of its (nonzero) digits is 518400, while the sum is 50.

The spelling of 11245111668509 in words is "eleven trillion, two hundred forty-five billion, one hundred eleven million, six hundred sixty-eight thousand, five hundred nine".