11386531487 has 4 divisors (see below), whose sum is σ = 11387047776. Its totient is φ = 11386015200.

The previous prime is 11386531483. The next prime is 11386531523. The reversal of 11386531487 is 78413568311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11386531487 - 2² = 11386531483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11386531483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223514 + ... + 269687.

It is an arithmetic number, because the mean of its divisors is an integer number (2846761944).

Almost surely, 2^11386531487 is an apocalyptic number.

11386531487 is a deficient number, since it is larger than the sum of its proper divisors (516289).

11386531487 is an equidigital number, since it uses as much as digits as its factorization.

11386531487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516288.

The product of its digits is 483840, while the sum is 47.

The spelling of 11386531487 in words is "eleven billion, three hundred eighty-six million, five hundred thirty-one thousand, four hundred eighty-seven".