1111718549 has 2 divisors, whose sum is σ = 1111718550. Its totient is φ = 1111718548.

The previous prime is 1111718537. The next prime is 1111718579. The reversal of 1111718549 is 9458171111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1080436900 + 31281649 = 32870^2 + 5593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111718549 - 2¹⁶ = 1111653013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111718579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555859274 + 555859275.

It is an arithmetic number, because the mean of its divisors is an integer number (555859275).

Almost surely, 2^1111718549 is an apocalyptic number.

It is an amenable number.

1111718549 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111718549 is an equidigital number, since it uses as much as digits as its factorization.

1111718549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 38.

The square root of 1111718549 is about 33342.4436566968. The cubic root of 1111718549 is about 1035.9328793418.

The spelling of 1111718549 in words is "one billion, one hundred eleven million, seven hundred eighteen thousand, five hundred forty-nine".