11661047875 has 8 divisors (see below), whose sum is σ = 14552987904. Its totient is φ = 9328838200.

The previous prime is 11661047851. The next prime is 11661047891. The reversal of 11661047875 is 57874016611.

11661047875 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11661047875 - 2⁷ = 11661047747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46644067 + ... + 46644316.

It is an arithmetic number, because the mean of its divisors is an integer number (1819123488).

Almost surely, 2^11661047875 is an apocalyptic number.

11661047875 is a deficient number, since it is larger than the sum of its proper divisors (2891940029).

11661047875 is an frugal number, since it uses more digits than its factorization.

11661047875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93288398 (or 93288388 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 11661047875 in words is "eleven billion, six hundred sixty-one million, forty-seven thousand, eight hundred seventy-five".