11223435985 has 4 divisors (see below), whose sum is σ = 13468123188. Its totient is φ = 8978748784.

The previous prime is 11223435961. The next prime is 11223435991. The reversal of 11223435985 is 58953432211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1675019329 + 9548416656 = 40927^2 + 97716^2 .

It is a cyclic number.

It is not a de Polignac number, because 11223435985 - 2⁵ = 11223435953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1122343594 + ... + 1122343603.

It is an arithmetic number, because the mean of its divisors is an integer number (3367030797).

Almost surely, 2^11223435985 is an apocalyptic number.

It is an amenable number.

11223435985 is a deficient number, since it is larger than the sum of its proper divisors (2244687203).

11223435985 is an equidigital number, since it uses as much as digits as its factorization.

11223435985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2244687202.

The product of its digits is 259200, while the sum is 43.

The spelling of 11223435985 in words is "eleven billion, two hundred twenty-three million, four hundred thirty-five thousand, nine hundred eighty-five".