11505368987 has 8 divisors (see below), whose sum is σ = 13922463456. Its totient is φ = 9281642112.

The previous prime is 11505368983. The next prime is 11505368989. The reversal of 11505368987 is 78986350511.

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 11505368987 - 2² = 11505368983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11505368983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48341768 + ... + 48342005.

It is an arithmetic number, because the mean of its divisors is an integer number (1740307932).

Almost surely, 2^11505368987 is an apocalyptic number.

11505368987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

11505368987 is a deficient number, since it is larger than the sum of its proper divisors (2417094469).

11505368987 is an equidigital number, since it uses as much as digits as its factorization.

11505368987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96683797.

The product of its (nonzero) digits is 1814400, while the sum is 53.

The spelling of 11505368987 in words is "eleven billion, five hundred five million, three hundred sixty-eight thousand, nine hundred eighty-seven".