11181265987 has 2 divisors, whose sum is σ = 11181265988. Its totient is φ = 11181265986.

The previous prime is 11181265957. The next prime is 11181266003. The reversal of 11181265987 is 78956218111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11181265987 - 2⁷ = 11181265859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11181265987.

It is not a weakly prime, because it can be changed into another prime (11181265957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5590632993 + 5590632994.

It is an arithmetic number, because the mean of its divisors is an integer number (5590632994).

Almost surely, 2^11181265987 is an apocalyptic number.

11181265987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11181265987 is an equidigital number, since it uses as much as digits as its factorization.

11181265987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 49.

The spelling of 11181265987 in words is "eleven billion, one hundred eighty-one million, two hundred sixty-five thousand, nine hundred eighty-seven".