11138678249 has 2 divisors, whose sum is σ = 11138678250. Its totient is φ = 11138678248.

The previous prime is 11138678207. The next prime is 11138678267. The reversal of 11138678249 is 94287683111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7406323600 + 3732354649 = 86060^2 + 61093^2 .

It is a cyclic number.

It is not a de Polignac number, because 11138678249 - 2³² = 6843710953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11138678197 and 11138678206.

It is not a weakly prime, because it can be changed into another prime (11138671249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5569339124 + 5569339125.

It is an arithmetic number, because the mean of its divisors is an integer number (5569339125).

Almost surely, 2^11138678249 is an apocalyptic number.

It is an amenable number.

11138678249 is a deficient number, since it is larger than the sum of its proper divisors (1).

11138678249 is an equidigital number, since it uses as much as digits as its factorization.

11138678249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The spelling of 11138678249 in words is "eleven billion, one hundred thirty-eight million, six hundred seventy-eight thousand, two hundred forty-nine".