11156641087 has 2 divisors, whose sum is σ = 11156641088. Its totient is φ = 11156641086.

The previous prime is 11156641063. The next prime is 11156641091. The reversal of 11156641087 is 78014665111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11156641087 - 2¹⁹ = 11156116799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11156641687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5578320543 + 5578320544.

It is an arithmetic number, because the mean of its divisors is an integer number (5578320544).

Almost surely, 2^11156641087 is an apocalyptic number.

11156641087 is a deficient number, since it is larger than the sum of its proper divisors (1).

11156641087 is an equidigital number, since it uses as much as digits as its factorization.

11156641087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 11156641087 in words is "eleven billion, one hundred fifty-six million, six hundred forty-one thousand, eighty-seven".