11456811985 has 8 divisors (see below), whose sum is σ = 13748861376. Its totient is φ = 9164991600.

The previous prime is 11456811983. The next prime is 11456811991. The reversal of 11456811985 is 58911865411.

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

It is not a de Polignac number, because 11456811985 - 2¹ = 11456811983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11456811983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84910 + ... + 173560.

It is an arithmetic number, because the mean of its divisors is an integer number (1718607672).

Almost surely, 2^11456811985 is an apocalyptic number.

It is an amenable number.

11456811985 is a deficient number, since it is larger than the sum of its proper divisors (2292049391).

11456811985 is an equidigital number, since it uses as much as digits as its factorization.

11456811985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114503.

The product of its digits is 345600, while the sum is 49.

The spelling of 11456811985 in words is "eleven billion, four hundred fifty-six million, eight hundred eleven thousand, nine hundred eighty-five".