11988484869 has 4 divisors (see below), whose sum is σ = 15984646496. Its totient is φ = 7992323244.

The previous prime is 11988484861. The next prime is 11988484877. The reversal of 11988484869 is 96848488911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 96848488911 = 3 ⋅32282829637.

It is an interprime number because it is at equal distance from previous prime (11988484861) and next prime (11988484877).

It is not a de Polignac number, because 11988484869 - 2³ = 11988484861 is a prime.

It is a super-2 number, since 2×11988484869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11988484861) 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, 1998080809 + ... + 1998080814.

It is an arithmetic number, because the mean of its divisors is an integer number (3996161624).

Almost surely, 2^11988484869 is an apocalyptic number.

It is an amenable number.

11988484869 is a deficient number, since it is larger than the sum of its proper divisors (3996161627).

11988484869 is an equidigital number, since it uses as much as digits as its factorization.

11988484869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996161626.

The product of its digits is 31850496, while the sum is 66.

The spelling of 11988484869 in words is "eleven billion, nine hundred eighty-eight million, four hundred eighty-four thousand, eight hundred sixty-nine".