11111245555789 has 4 divisors (see below), whose sum is σ = 11245115984256. Its totient is φ = 10977375127324.

The previous prime is 11111245555741. The next prime is 11111245555841. The reversal of 11111245555789 is 98755554211111.

It is a happy number.

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 11111245555789 - 2²⁹ = 11110708684877 is a prime.

It is a super-2 number, since 2×11111245555789² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111245553789) 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, 66935214109 + ... + 66935214274.

It is an arithmetic number, because the mean of its divisors is an integer number (2811278996064).

Almost surely, 2^{11111245555789} is an apocalyptic number.

It is an amenable number.

11111245555789 is a deficient number, since it is larger than the sum of its proper divisors (133870428467).

11111245555789 is an equidigital number, since it uses as much as digits as its factorization.

11111245555789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133870428466.

The product of its digits is 2520000, while the sum is 55.

The spelling of 11111245555789 in words is "eleven trillion, one hundred eleven billion, two hundred forty-five million, five hundred fifty-five thousand, seven hundred eighty-nine".