11978289087 has 8 divisors (see below), whose sum is σ = 16195996800. Its totient is φ = 7873053720.

The previous prime is 11978289067. The next prime is 11978289121. The reversal of 11978289087 is 78098287911.

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

It is not a de Polignac number, because 11978289087 - 2⁸ = 11978288831 is a prime.

It is a super-3 number, since 3×11978289087³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11978289087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11978289007) 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, 28117837 + ... + 28118262.

It is an arithmetic number, because the mean of its divisors is an integer number (2024499600).

Almost surely, 2^11978289087 is an apocalyptic number.

11978289087 is a deficient number, since it is larger than the sum of its proper divisors (4217707713).

11978289087 is an equidigital number, since it uses as much as digits as its factorization.

11978289087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56236173.

The product of its (nonzero) digits is 4064256, while the sum is 60.

The spelling of 11978289087 in words is "eleven billion, nine hundred seventy-eight million, two hundred eighty-nine thousand, eighty-seven".