11311873985 has 8 divisors (see below), whose sum is σ = 13577433576. Its totient is φ = 9047376000.

The previous prime is 11311873949. The next prime is 11311873997. The reversal of 11311873985 is 58937811311.

It can be written as a sum of positive squares in 4 ways, for example, as 47872561 + 11264001424 = 6919^2 + 106132^2 .

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

It is not a de Polignac number, because 11311873985 - 2¹⁰ = 11311872961 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241766 + ... + 284735.

It is an arithmetic number, because the mean of its divisors is an integer number (1697179197).

Almost surely, 2^11311873985 is an apocalyptic number.

It is an amenable number.

11311873985 is a deficient number, since it is larger than the sum of its proper divisors (2265559591).

11311873985 is an equidigital number, since it uses as much as digits as its factorization.

11311873985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530803.

The product of its digits is 181440, while the sum is 47.

The spelling of 11311873985 in words is "eleven billion, three hundred eleven million, eight hundred seventy-three thousand, nine hundred eighty-five".