12565440103 has 8 divisors (see below), whose sum is σ = 12683230560. Its totient is φ = 12447695520.

The previous prime is 12565440089. The next prime is 12565440113. The reversal of 12565440103 is 30104456521.

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 12565440103 - 2¹³ = 12565431911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12565440113) 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, 814326 + ... + 829612.

It is an arithmetic number, because the mean of its divisors is an integer number (1585403820).

Almost surely, 2^12565440103 is an apocalyptic number.

12565440103 is a deficient number, since it is larger than the sum of its proper divisors (117790457).

12565440103 is a wasteful number, since it uses less digits than its factorization.

12565440103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22937.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 12565440103 its reverse (30104456521), we get a palindrome (42669896624).

The spelling of 12565440103 in words is "twelve billion, five hundred sixty-five million, four hundred forty thousand, one hundred three".