1111784511949 has 2 divisors, whose sum is σ = 1111784511950. Its totient is φ = 1111784511948.

The previous prime is 1111784511931. The next prime is 1111784511953. The reversal of 1111784511949 is 9491154871111.

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., 904245042724 + 207539469225 = 950918^2 + 455565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111784511949 - 2⁵ = 1111784511917 is a prime.

It is a super-2 number, since 2×1111784511949² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1111784511896 and 1111784511905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111784511919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555892255974 + 555892255975.

It is an arithmetic number, because the mean of its divisors is an integer number (555892255975).

Almost surely, 2^{1111784511949} is an apocalyptic number.

It is an amenable number.

1111784511949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111784511949 is an equidigital number, since it uses as much as digits as its factorization.

1111784511949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 52.

The spelling of 1111784511949 in words is "one trillion, one hundred eleven billion, seven hundred eighty-four million, five hundred eleven thousand, nine hundred forty-nine".