11109999999949 has 2 divisors, whose sum is σ = 11109999999950. Its totient is φ = 11109999999948.

The previous prime is 11109999999863. The next prime is 11110000000009. The reversal of 11109999999949 is 94999999990111.

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., 10533984272100 + 576015727849 = 3245610^2 + 758957^2 .

It is a cyclic number.

It is not a de Polignac number, because 11109999999949 - 2²¹ = 11109997902797 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11109999999949.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11109999909949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5554999999974 + 5554999999975.

It is an arithmetic number, because the mean of its divisors is an integer number (5554999999975).

Almost surely, 2^{11109999999949} is an apocalyptic number.

It is an amenable number.

11109999999949 is a deficient number, since it is larger than the sum of its proper divisors (1).

11109999999949 is an equidigital number, since it uses as much as digits as its factorization.

11109999999949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1549681956, while the sum is 88.

The spelling of 11109999999949 in words is "eleven trillion, one hundred nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred forty-nine".