12665485481 has 16 divisors (see below), whose sum is σ = 14554632960. Its totient is φ = 10900172880.

The previous prime is 12665485451. The next prime is 12665485489. The reversal of 12665485481 is 18458456621.

It is a cyclic number.

It is not a de Polignac number, because 12665485481 - 2¹⁰ = 12665484457 is a prime.

It is a super-2 number, since 2×12665485481² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12665485489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277010 + ... + 319476.

It is an arithmetic number, because the mean of its divisors is an integer number (909664560).

Almost surely, 2^12665485481 is an apocalyptic number.

12665485481 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12665485481 is a deficient number, since it is larger than the sum of its proper divisors (1889147479).

12665485481 is a wasteful number, since it uses less digits than its factorization.

12665485481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43924.

The product of its digits is 1843200, while the sum is 50.

The spelling of 12665485481 in words is "twelve billion, six hundred sixty-five million, four hundred eighty-five thousand, four hundred eighty-one".