11867487844 has 9 divisors (see below), whose sum is σ = 20768485017. Its totient is φ = 5933634984.

The previous prime is 11867487833. The next prime is 11867487847. The reversal of 11867487844 is 44878476811.

It is a happy number.

The square root of 11867487844 is 108938.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8753847844 + 3113640000 = 93562^2 + 55800^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11867487847) 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 2 ways as a sum of consecutive naturals, for example, 190642 + ... + 245110.

Almost surely, 2^11867487844 is an apocalyptic number.

11867487844 is the 108938-th square number.

It is an amenable number.

11867487844 is a deficient number, since it is larger than the sum of its proper divisors (8900997173).

11867487844 is an frugal number, since it uses more digits than its factorization.

11867487844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108942 (or 54471 counting only the distinct ones).

The product of its digits is 9633792, while the sum is 58.

The spelling of 11867487844 in words is "eleven billion, eight hundred sixty-seven million, four hundred eighty-seven thousand, eight hundred forty-four".