11155028987 has 2 divisors, whose sum is σ = 11155028988. Its totient is φ = 11155028986.

The previous prime is 11155028971. The next prime is 11155029007. The reversal of 11155028987 is 78982055111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11155028987 - 2⁴ = 11155028971 is a prime.

It is not a weakly prime, because it can be changed into another prime (11155028917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577514493 + 5577514494.

It is an arithmetic number, because the mean of its divisors is an integer number (5577514494).

Almost surely, 2^11155028987 is an apocalyptic number.

11155028987 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155028987 is an equidigital number, since it uses as much as digits as its factorization.

11155028987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 47.

The spelling of 11155028987 in words is "eleven billion, one hundred fifty-five million, twenty-eight thousand, nine hundred eighty-seven".