11985488887 has 4 divisors (see below), whose sum is σ = 11987682696. Its totient is φ = 11983295080.

The previous prime is 11985488873. The next prime is 11985488891. The reversal of 11985488887 is 78888458911.

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 11985488887 - 2¹¹ = 11985486839 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 (11985488897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1088689 + ... + 1099642.

It is an arithmetic number, because the mean of its divisors is an integer number (2996920674).

Almost surely, 2^11985488887 is an apocalyptic number.

11985488887 is a deficient number, since it is larger than the sum of its proper divisors (2193809).

11985488887 is an equidigital number, since it uses as much as digits as its factorization.

11985488887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193808.

The product of its digits is 41287680, while the sum is 67.

The spelling of 11985488887 in words is "eleven billion, nine hundred eighty-five million, four hundred eighty-eight thousand, eight hundred eighty-seven".