11869715587 has 4 divisors (see below), whose sum is σ = 12494437480. Its totient is φ = 11244993696.

The previous prime is 11869715567. The next prime is 11869715591. The reversal of 11869715587 is 78551796811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78551796811 = 3373 ⋅23288407.

It is a cyclic number.

It is not a de Polignac number, because 11869715587 - 2¹¹ = 11869713539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11869715527) 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 3 ways as a sum of consecutive naturals, for example, 312360918 + ... + 312360955.

It is an arithmetic number, because the mean of its divisors is an integer number (3123609370).

Almost surely, 2^11869715587 is an apocalyptic number.

11869715587 is a deficient number, since it is larger than the sum of its proper divisors (624721893).

11869715587 is an equidigital number, since it uses as much as digits as its factorization.

11869715587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624721892.

The product of its digits is 4233600, while the sum is 58.

The spelling of 11869715587 in words is "eleven billion, eight hundred sixty-nine million, seven hundred fifteen thousand, five hundred eighty-seven".