11987648239 has 16 divisors (see below), whose sum is σ = 13789771776. Its totient is φ = 10208131200.

The previous prime is 11987648219. The next prime is 11987648263. The reversal of 11987648239 is 93284678911.

It is a cyclic number.

It is not a de Polignac number, because 11987648239 - 2¹¹ = 11987646191 is a prime.

It is a super-2 number, since 2×11987648239² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11987648219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 718854 + ... + 735340.

It is an arithmetic number, because the mean of its divisors is an integer number (861860736).

Almost surely, 2^11987648239 is an apocalyptic number.

11987648239 is a deficient number, since it is larger than the sum of its proper divisors (1802123537).

11987648239 is a wasteful number, since it uses less digits than its factorization.

11987648239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17166.

The product of its digits is 5225472, while the sum is 58.

The spelling of 11987648239 in words is "eleven billion, nine hundred eighty-seven million, six hundred forty-eight thousand, two hundred thirty-nine".