11881117487 has 8 divisors (see below), whose sum is σ = 12552937200. Its totient is φ = 11213947584.

The previous prime is 11881117481. The next prime is 11881117579. The reversal of 11881117487 is 78471118811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11881117487 - 2¹⁴ = 11881101103 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 (11881117481) 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 7 ways as a sum of consecutive naturals, for example, 1157198 + ... + 1167419.

It is an arithmetic number, because the mean of its divisors is an integer number (1569117150).

Almost surely, 2^11881117487 is an apocalyptic number.

11881117487 is a deficient number, since it is larger than the sum of its proper divisors (671819713).

11881117487 is a wasteful number, since it uses less digits than its factorization.

11881117487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324905.

The product of its digits is 100352, while the sum is 47.

The spelling of 11881117487 in words is "eleven billion, eight hundred eighty-one million, one hundred seventeen thousand, four hundred eighty-seven".