11111955093409 has 2 divisors, whose sum is σ = 11111955093410. Its totient is φ = 11111955093408.

The previous prime is 11111955093397. The next prime is 11111955093427. The reversal of 11111955093409 is 90439055911111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9274582976400 + 1837372117009 = 3045420^2 + 1355497^2 .

It is an emirp because it is prime and its reverse (90439055911111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111955093409 - 2¹¹ = 11111955091361 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111955097409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555977546704 + 5555977546705.

It is an arithmetic number, because the mean of its divisors is an integer number (5555977546705).

Almost surely, 2^{11111955093409} is an apocalyptic number.

It is an amenable number.

11111955093409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111955093409 is an equidigital number, since it uses as much as digits as its factorization.

11111955093409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 218700, while the sum is 49.

The spelling of 11111955093409 in words is "eleven trillion, one hundred eleven billion, nine hundred fifty-five million, ninety-three thousand, four hundred nine".