11975915911 has 8 divisors (see below), whose sum is σ = 12302527664. Its totient is φ = 11649458880.

The previous prime is 11975915909. The next prime is 11975915921. The reversal of 11975915911 is 11951957911.

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

It is not a de Polignac number, because 11975915911 - 2¹ = 11975915909 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 (11975915921) 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, 127876 + ... + 200758.

It is an arithmetic number, because the mean of its divisors is an integer number (1537815958).

Almost surely, 2^11975915911 is an apocalyptic number.

11975915911 is a deficient number, since it is larger than the sum of its proper divisors (326611753).

11975915911 is an equidigital number, since it uses as much as digits as its factorization.

11975915911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77361.

The product of its digits is 127575, while the sum is 49.

The spelling of 11975915911 in words is "eleven billion, nine hundred seventy-five million, nine hundred fifteen thousand, nine hundred eleven".