12811585433 has 8 divisors (see below), whose sum is σ = 13013809536. Its totient is φ = 12610501200.

The previous prime is 12811585427. The next prime is 12811585469. The reversal of 12811585433 is 33458511821.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12811585433 - 2⁴ = 12811585417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12811585133) 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, 262298 + ... + 307283.

It is an arithmetic number, because the mean of its divisors is an integer number (1626726192).

Almost surely, 2^12811585433 is an apocalyptic number.

It is an amenable number.

12811585433 is a deficient number, since it is larger than the sum of its proper divisors (202224103).

12811585433 is an equidigital number, since it uses as much as digits as its factorization.

12811585433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569935.

The product of its digits is 115200, while the sum is 41.

The spelling of 12811585433 in words is "twelve billion, eight hundred eleven million, five hundred eighty-five thousand, four hundred thirty-three".