12565544412407 has 8 divisors (see below), whose sum is σ = 14375320885536. Its totient is φ = 10759442614272.

The previous prime is 12565544412359. The next prime is 12565544412409. The reversal of 12565544412407 is 70421444556521.

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 12565544412407 - 2²² = 12565540218103 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 (12565544412409) 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, 918661418 + ... + 918675095.

It is an arithmetic number, because the mean of its divisors is an integer number (1796915110692).

Almost surely, 2^{12565544412407} is an apocalyptic number.

12565544412407 is a deficient number, since it is larger than the sum of its proper divisors (1809776473129).

12565544412407 is an equidigital number, since it uses as much as digits as its factorization.

12565544412407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837337497.

The product of its (nonzero) digits is 5376000, while the sum is 50.

Adding to 12565544412407 its reverse (70421444556521), we get a palindrome (82986988968928).

The spelling of 12565544412407 in words is "twelve trillion, five hundred sixty-five billion, five hundred forty-four million, four hundred twelve thousand, four hundred seven".