11181265957 has 2 divisors, whose sum is σ = 11181265958. Its totient is φ = 11181265956.

The previous prime is 11181265919. The next prime is 11181265987. The reversal of 11181265957 is 75956218111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9542554596 + 1638711361 = 97686^2 + 40481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11181265957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11181265987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5590632978 + 5590632979.

It is an arithmetic number, because the mean of its divisors is an integer number (5590632979).

Almost surely, 2^11181265957 is an apocalyptic number.

It is an amenable number.

11181265957 is a deficient number, since it is larger than the sum of its proper divisors (1).

11181265957 is an equidigital number, since it uses as much as digits as its factorization.

11181265957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 46.

The spelling of 11181265957 in words is "eleven billion, one hundred eighty-one million, two hundred sixty-five thousand, nine hundred fifty-seven".