11505200387 has 2 divisors, whose sum is σ = 11505200388. Its totient is φ = 11505200386.

The previous prime is 11505200327. The next prime is 11505200389. The reversal of 11505200387 is 78300250511.

11505200387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11505200387 - 2¹⁸ = 11504938243 is a prime.

Together with 11505200389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11505200389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5752600193 + 5752600194.

It is an arithmetic number, because the mean of its divisors is an integer number (5752600194).

Almost surely, 2^11505200387 is an apocalyptic number.

11505200387 is a deficient number, since it is larger than the sum of its proper divisors (1).

11505200387 is an equidigital number, since it uses as much as digits as its factorization.

11505200387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 32.

Adding to 11505200387 its reverse (78300250511), we get a palindrome (89805450898).

The spelling of 11505200387 in words is "eleven billion, five hundred five million, two hundred thousand, three hundred eighty-seven".